But what if you only have a standard cellphone with a lousy Web browser — or even the best Web-browsing phone, but it lacks a fast data connection? What if you’re speeding down the road in a car, where typing is dangerous?

Now, there’s a way to get your questions answered despite those hurdles. It’s a free cellphone service that lets you ask any question answerable via a Web search, using any cellphone, by simply making a voice call. It’s called ChaCha, and I’ve been testing it out.

To use ChaCha, you just dial 800-2chacha (800-224-2242) and state your question. In a few minutes, you’ll get an answer via text message. In one test, I asked ChaCha who was the winning pitcher in the previous night’s Red Sox victory against the Yankees. In a few minutes, I received a text message with the correct answer: Daisuke Matsuzaka.

ChaCha requires no registration and works on any cellphone carrier. It needs no special codes or key words. You just state your question as if you were asking a friend. If you prefer to type your question, you can text it to “ChaCha,” or 242242. Though ChaCha itself charges no fees, your phone carrier may charge for the minutes you use, or for the text messages.

The service works by routing your questions to one of 10,000 hired “guides” — students, stay-at-home parents, retirees and others — who look up the questions on the Web and reply. They get paid 20 cents per answer.

Naturally, these guides vary as to their speed and accuracy. If you don’t like the answers they give you, or you want related information, you can call back or reply to the text message with a follow-up question. For instance, after learning which pitcher had won for Boston, I asked who lost the game for New York. I was quickly informed it was Phil Hughes.

Overall, I liked ChaCha. In most cases, I received fast, accurate, useful answers. But it has two weaknesses. One is that the low-paid, part-time guides can provide inconsistent service. When I asked for the best Mexican restaurant in D.C., for example, ChaCha came up with a choice that few locals would cite.

The other is that, unlike many other cellphone information services, ChaCha doesn’t automatically know your location. So, unless you include a location in your query, it’s clueless about questions such as “Where’s the nearest drugstore?”

ChaCha is hardly the only information service for cellphones. Google offers a text-message service where you can ask questions on a wide variety of topics, and a voice-based service that locates businesses near your location. Microsoft’s TellMe subsidiary just introduced a voice-based service that answers location-specific questions about businesses, weather, traffic and movies, and displays the answers on the screens of BlackBerrys.

But these competitors are more limited than ChaCha in key respects. Google’s broader mobile-search service, Google SMS, requires that questions be sent via text message using special key words. Its voice service, Goog411, finds only local businesses. TellMe’s new service is limited to location-based information and works only on certain phones.

I tested ChaCha using three very different phones: a cheap, bare-bones Samsung flip phone from Sprint; a midrange Motorola Razr from Verizon; and an Apple iPhone running on AT&T. I asked questions via voice and text from various locations, including my car, where I used a hands-free microphone.

I asked about sports, TV shows, journalism, history, weather, nutrition, demographics and shopping. ChaCha handled most of these inquiries correctly and was able to fix most of its errors after I asked follow-up questions. For each question, it sends two text messages: one restating your query and saying it’s working on it, and the second containing the answer.

Each ChaCha answer is accompanied by a Web link. If your phone has a decent browser, you can go to that link to learn who the guide was, and what his or her Web-site source was.

ChaCha gave me the weekend weather forecast in Boston, the date of death of Abigail Adams and the cast of the TV show “Brothers & Sisters.” It provided Peyton Manning’s salary and the sodium content of a McDonald’s quarter pounder. Its most impressive performance came when it correctly answered an obscure historical question: “When was the Gaspee burned?” The Gaspee was a British tax-collection ship burned in Rhode Island in 1772 in what is often considered the first act of war of the American Revolution.

The company is working on adding automated location knowledge, at least on certain carriers and phones. For now, you can tell it your location by sending a special command via text message. But even without the location features, ChaCha is a fun and useful service.

Find all of Walt Mossberg’s columns and videos online, free, at the new All Things Digital Web site, http://walt.allthingsd.com. Email him at mossberg@wsj.com.

Corrections & Amplifications

ChaCha, a mobile-phone search service, is incompatible with several small U.S. cellphone carriers. This column incorrectly said that the service works on any cellphone carrier, based on incorrect information supplied by the company.

In fact, this category is getting so crowded that it’s hard to follow all of the contenders. T-Mobile and Sprint, for example, have just announced very similar smart phones running Microsoft’s latest Windows Mobile software. Both feature horizontal keyboards that slide out from beneath the screen. The T-Mobile Wing costs $299 after various rebates, while the Sprint Mogul, which runs on a faster network, costs $399.

But I’ve been testing two other new smart phones that I find especially interesting. One is the latest attempt by BlackBerry maker Research In Motion to appeal to consumers. The other is a high-resolution camera phone by Nokia, which costs more than even the iPhone.

The new BlackBerry Curve 8300, sold by AT&T, is sort of a cross between the maker’s low-end consumer-oriented Pearl and its larger, more traditional models like the 8800 series. It costs $199 after rebate, with a two-year contract.

Unlike the Pearl, which manages its slender size by sporting only a squished keyboard where two letters must share each key, the Curve has a full, if slightly compressed, keyboard. I found it no problem to use accurately. It does, however, use the Pearl-like trackball instead of the famous BlackBerry side-mounted wheel.

To accommodate the keyboard and a wider screen, the Curve is wider and a bit thicker than the Pearl, and has more of the traditional BlackBerry look. And it’s over 20% heavier. But it’s narrower, shorter and lighter than the 8800, though a bit thicker.

The silver-colored Curve doesn’t boast any technological breakthroughs. It’s mostly an attempt to bring the BlackBerry’s email capabilities to a model that doesn’t compromise the keyboard the way the Pearl did. It has all the traditional BlackBerry features, plus a two-megapixel camera, a slot for a memory card, and the ability to play music and videos.

In my tests, I had no trouble at all sending and receiving email on the Curve, taking or displaying pictures, or playing music. I was able to move over some songs and pictures from my own computer, and they displayed and played as promised. Voice quality was fine, and phone talk time is about four hours — reasonable but not outstanding.

In a welcome move, the Curve has a standard headphone jack, capable of playing music in stereo and handling phone calls. It also includes Bluetooth for wireless headsets and use in cars, but it doesn’t have Wi-Fi wireless networking. It also runs on AT&T’s relatively slow EDGE network instead of the carrier’s faster data network. And the Web browser is mediocre.

The Nokia N95 lacks a full keyboard, physical or virtual and its email is primitive, but that’s not its main purpose. This device is the best combination of a camera and a phone I’ve ever tested, and includes a long list of other media features.

The camera boasts five megapixel resolution, highly unusual for a phone, and it takes marvelous photos. When I transferred my shots to my computer, they were large, sharp and vivid, just as if they’d come from a standard camera. The camera has Carl Zeiss optics, autofocus, multiple flash settings and various scene settings. It also has a burst mode capable of taking six shots in rapid sequence.

But getting such a good camera in a phone will set you back a whopping $749. And you can’t buy it through any phone carrier, only from Nokia’s Web site (nseries.com) or from various electronics stores. You have to buy a phone plan separately.

Nokia’s N95, left, and BlackBerry’s Curve 8300

Like the Curve, the N95 has good voice quality, but runs on the slow EDGE network, though a future version could support faster networks. Unlike the BlackBerry, the current N95 also can use Wi-Fi networks. Battery life is only fair: 3.5 hours of talk time. While Nokia touts the phone’s Web browser, I found it to be unimpressive. But the phone includes GPS mapping, with optional navigation. It also accepts memory cards for storage.

Physically, the N95 is small, but chunky; on one side, it looks like a plum-colored camera. If you slide its screen in one direction, the keypad is revealed. Sliding it the opposite way reveals standard controls for playing music and video clips. I was able to move pictures and songs from my computer, but the songs failed to display album covers when played.

For $749, you could buy the Curve and a very nice digital camera. But the N95 is for photo enthusiasts who want an all-in-one device. The Curve is a more mainstream smart phone that aims for a balance of features at a low price.

• Email me at mossberg@wsj.com. Find all my columns and videos online free at the new All Things Digital Web site, http://walt.allthingsd.com.

Partisans of these platforms can argue all day about which is better. But the competitors have some things in common. Windows computers and Apple Macintoshes can both display the same photos and office documents, and play the same MP3 songs and YouTube videos. BlackBerrys and Treos can receive the same emails and call the same phone numbers.

It isn’t perfect. There are some files that don’t play well across platforms. But most common content does.

Yet there’s another technology competition that doesn’t share content well and offers few, if any, benefits to consumers. It’s the fight among two groups of technology companies and movie studios to sell a successor to the DVD. Each has developed a new type of disc that has the ability to show movies in high definition. To my eye, the pictures they deliver are identical.

Neither of these competing new discs, called Blu-ray and HD-DVD, works in current DVD players. They require very expensive new players, and the new players can’t handle both new disc formats, only one or the other.

Adding to the annoyance: Some movie studios release movies only in one of the two formats. Paramount and Warner Brothers support both formats, but Universal supports only HD-DVD, and Disney, Fox and Sony only Blu-ray.

So, in order to be sure you can play any movie released as a high-definition disc, you would have to replace your old DVD player with two new, much costlier players. It would be like having to buy separate TV sets to watch different networks’ programs.

Now, however, one gutsy company, LG Electronics, of Korea, a longtime member of the Blu-ray camp, has broken ranks and introduced a new combo player that can handle three formats: Blu-ray, HD-DVD, and regular old DVDs. It’s called the BH100 Super Multi Blue.

I’ve tested this combo player and found that it plays both new formats, as well as regular DVDs, just fine. But it’s more expensive than most single-format players and has some serious limitations when navigating through the menus on HD-DVD titles. For now, I can only recommend it for serious videophiles with deep pockets, but I’m hoping it’s the start of a trend that will end the foolish war.

The BH100 costs $1,200. That’s vastly more expensive than the newest DVD players, which, for less than $100, can take a regular DVD and “upscale” it so it looks better on a high-definition set. But that $1,200 isn’t so outrageous if you compare it with the price of buying two separate Blu-ray and HD-DVD players, which can reach or exceed $1,000 total. And the new LG takes up only one input on your TV, occupies less space on your component shelf and requires just one remote control.

I tested the LG combo player on my high-definition TV with this year’s Oscar-winning best picture, “The Departed,” and with “Superman Returns,” each of which is available in both of the new formats, as well as on DVD.

All played perfectly. The picture looked great in both formats and was noticeably better than an upscaled DVD image, which the LG unit also can produce. The LG outputs both new formats in a high, but grossly overhyped, resolution called “1080p.”

But the BH100 did a much better job with the Blu-ray discs than with the HD-DVD titles. That’s because while the combo player can play HD-DVD movies perfectly, it can’t display the HD-DVD discs’ menus for selecting scenes or accessing special features.

These menus usually offer the title and a photo to identify a scene, and the title and/or a description of the special feature. But on the LG BH100, the HD-DVD menus have no pictures, titles, or descriptions and look nothing like the original. They only identify scenes by number and duration. That makes it hard to find, say, the deleted scenes from “The Departed,” or the documentaries on the Superman disc.

The BH100 was based on a Blu-ray-only player and lacks the special chips HD-DVD players use to display the menus properly. LG had to concoct its own rudimentary replacements for those menus. The company says a future combo model could include the chips and thus display the HD-DVD menus as well as it does the Blu-ray menus, but it hasn’t decided whether to make such a product.

One reason for that decision may be the competing approach to solving the stupid disc war. Warner Brothers is working on a combo disc, instead of a combo player. This disc would hold both the Blu-ray and HD-DVD versions of a movie, so you could pop it into whichever type of player you own.

Until the electronics and movie companies support universal high-definition players and/or universal high-definition discs, I don’t recommend that most people invest in either technology. Why prolong a war that’s bad for consumers?

Email me at mossberg@wsj.com. See video versions of my reviews at wsj.com/mossbergvideo.

The convergence of the computer and consumer-electronics businesses, including the mobile-phone business, is accelerating. Apple dropped the word “computer” from its corporate name last month and announced its new iPhone big-screen cellphone, to ship in June. Hewlett-Packard quietly announced its first real mobile phone last week. Smart-phone makers Palm and Research In Motion are really hybrids of cellphone and computer companies.

Meanwhile, traditional mobile-phone makers like Motorola, Nokia and Samsung have all turned out smart phones, which are, in effect, little computers, with the ability to handle email, multimedia, Web browsing and more.

Nokia, long the leading mobile-phone company, has been pursuing an even more radical project — a hand-held computer that isn’t a cellphone at all. It has just brought out the latest version of this product, the $399 N800 Internet Tablet, and I’ve been testing it. The N800 is part of a long-term strategy by Nokia to evolve into a company that’s more a maker of small multimedia devices with connectivity, rather than primarily a maker of phones.

The N800 is an overhauled version of the 770 I reviewed last year. That model, priced at $360, was so underpowered as to be almost useless. The new one is speedier, more powerful, thinner and lighter, albeit a bit longer. Like the 770, the N800 is designed to connect to the Internet via a Wi-Fi wireless network, though it can use a cellphone as a modem. Like the 770, it uses a touch screen and virtual keyboard.

The new model has some nice features the 770 lacked, like a pop-out video camera, and the ability to make voice calls over the Internet. It can take two standard memory cards, rather than the one oddball card the 770 accepted. Like the 770, it does a far better job of browsing the Web than any smart phone on the market today.

The screen, like the 770’s, is huge — 4.2 inches diagonally — and with a stunning resolution of 800 x 480, significantly larger and sharper than the much-touted iPhone screen.

But, like the 770, the new N800 is a good example of how hard it is for a company that grew up in one business to migrate successfully to another. I can’t imagine many people carrying around this device. For one thing, the N800 is a tweener — smaller than a laptop, but too big for a pocket. It’s 5.7 inches long, 2.95 inches wide and 0.5 inch thick. It weighs 7.27 ounces. The iPhone is smaller and lighter.

More importantly, the N800’s software seems unpolished and unfinished. There’s no calendar application, no method for synchronizing data from a PC, no software for using the camera to record videos or snap still pictures, though Nokia says that’s coming. And there’s no simple way to use the camera for video conferencing with a PC, unless you get somebody else to download a special Nokia program. The company hopes to solve this later with a Skype program for the device. You can make a video call to another N800.

The N800 Internet Tablet, $399, has a touch screen.

Nokia is hoping that open-source developers will help polish the N800’s software and add functions. This is an idealistic goal, and has won the hearts of some techies. But mainstream consumers expect complete functions on the device, out of the box. Third-party software is a great thing, but it isn’t a substitute for strong software from the manufacturer.

Still, the N800 does some things well. Web browsing is a pleasure, because pages render much like they do on a real PC, and you can see a much larger portion of each page than you can on a typical phone, even a Windows Mobile or Palm model. Handy buttons on the top of the Nokia make this even better, by zooming in or out on the Web page, or instantly hiding the navigation controls so the page can claim the whole screen.

Instant messaging also worked well, although the only prominent service bundled with the N800 is Google Talk. I also successfully made and received Internet voice calls via Google Talk. These were clear and easy, though they don’t fully compensate for the lack of a built-in cellphone. An RSS feed reader, which sucked in headlines from various Web sites, was also good, as was the photo-viewing program.

The email program is fair, if pretty bare-bones and sometimes slow. BlackBerry addicts are unlikely to accept the onscreen keyboard in place of a real one. Some attachments, such as pictures or PDF files, open easily, but Word documents never even showed up in my tests.

We won’t know until June whether Apple has been able to successfully invade Nokia’s turf and make a decent cellphone. But so far, Nokia is struggling to go the other way.

• Email me at mossberg@wsj.com. See video versions of my reviews at wsj.com/mossbergvideo.

But that image will change radically next week when the BlackBerry’s maker, Research in Motion, introduces a sleek but powerful model called simply the Pearl. It’s not only the smallest BlackBerry ever made. It’s also the smallest smart phone from any maker with a keyboard for typing emails and other text.

All shiny black and silver, the slender Pearl looks more like a fashion phone than a keyboard-equipped smart phone. It is shorter, narrower and lighter than the much-admired Motorola Q, though a bit thicker. And, like the Q, the Pearl, which is being launched next Tuesday by T-Mobile, costs $199 with a two-year contract. The Pearl is squarely aimed at consumers who need powerful email capabilities, but also want style and bells and whistles.

When it comes to email, the Pearl is a true BlackBerry. The email interface is essentially the same as on larger BlackBerrys. It can be used with a traditional corporate BlackBerry email system, and, for consumers, it works with the BlackBerry Internet Service offered by T-Mobile.

Still, for hard-core BlackBerry addicts, the Pearl is a shocking departure. The iconic side scroll wheel has been replaced by a tiny, light-up trackball beneath the large, bright color screen. It’s the first BlackBerry with a camera, the first with a memory card slot (though no card is included) and the first to play songs and videos.

And then there’s the keyboard, where the slim new design has required a major compromise. As on the older and bulkier BlackBerry 7100 series, the full keyboard has been replaced by a smaller version that squeezes two letters onto most keys. To avoid repetition and error, the Pearl uses smart software called SureType that has the uncanny ability to guess the word you meant to type in almost all cases. But it doesn’t work if you’re entering a new Web address or a person’s name that the phone hasn’t memorized.

To find out if RIM can actually be cool, I’ve been toting around a Pearl, testing all its functions. In general, I like it, and can recommend it to anyone who wants real BlackBerry email capabilities in a great-looking multimedia phone. Voice quality was excellent and the interface for making phone calls, once a big problem on BlackBerrys, is now decent. There’s even a Treo-like universal silencer button, and the speaker phone function turns on and off with a single key press.

Setting up an email account with the BlackBerry Internet Service is easily done, either on the phone or via a T-Mobile Web page. This service replaces a corporate email server with a Web-based email system that pushes messages to the phone from an existing email account or from a new one. T-Mobile plans to charge $19.99 a month for unlimited email and Web browsing on top of the price of an existing voice plan.

The Pearl pushed my normal email to the phone perfectly, and, in that respect, it acted just like every other BlackBerry I’ve used. Because of the different keyboard, some of the keyboard shortcuts for navigating in email and other applications differ from those on older models. If you change a couple of settings, you can delete an email with one click, and whole batches of emails can be deleted with two clicks.

Popular email attachment types, including Microsoft Word and Excel files, can be opened and read, but not edited. I was able to easily synchronize calendar and contact entries with Microsoft Outlook on a Windows PC, and to easily transfer songs, pictures and videos to the Pearl using RIM’s desktop software.

The Pearl’s music software correctly read the artist, album and song information on every track I loaded into the phone, and even displayed the album covers. The speaker on the Pearl sounds good, and music sounds even better with stereo headphones.

Photos also displayed well, and the Pearl can zoom in on them or show them as slideshows. Any song can be turned into your ring tone, and any picture can be used as your desktop wallpaper.

The Pearl really shone when playing video. Unfortunately, it accepts only a limited number of video file types, and even many of those I tested didn’t work. Some videos sucked up so much of the phone’s power that other functions, even pausing the playback, were very slow.

The Web browser is OK, but it’s hampered by what I consider the biggest drawback to the Pearl: the network on which it runs. T-Mobile uses a network technology called EDGE, which is much, much slower than the fastest networks offered by Verizon, Sprint and Cingular.

There’s another reason I’m not trading my Palm Treo 700p for a Pearl: the user interface. While RIM has jazzed up the hardware and feature set, there’s still way too much multiple clicking and menu opening for my taste.

But the Pearl is a beautiful piece of work, a very nice combination of hard-core email capability and fun features.

Email me at mossberg@wsj.com.

The Finnish cellphone giant is introducing a phone called the E62 that resembles, and is aimed at, the Palm Treo, the latest BlackBerry phones from Research In Motion and the Motorola Q.

Nokia’s E62

Like those other smart phones, the E62 has a full keyboard and is actually a little computer that is meant to be a serious email device as well as a phone. Like the Q and the Treo, it can play music and videos, surf the Web, and display photos.

Unlike the Treo and the Q, however, the Nokia E62 can run a service licensed by RIM that allows it to behave like a BlackBerry. It can send and receive email using either a corporate BlackBerry server or a consumer BlackBerry service offered by a cellphone carrier.

I’ve been testing the E62 and I like it. It’s fairly utilitarian-looking and won’t likely become an object of desire like the Q and the Treo. But it gets the job done and may well be the best bargain in its category.

In the past, Nokia has relied on a smart-phone design that was a thick, long device that flipped open to reveal a wide, horizontally aligned keyboard and screen. That design sold OK in Europe but flopped in the U.S. Now, with the E62, Nokia is adopting the American-type design pioneered by the BlackBerry and used by the Treo and the Q.

Nokia is being coy about the timing, pricing and wireless carrier for the E62. But I expect it to be available late next month from Cingular Wireless. And I expect it to cost even less than the Q, which at $199 is the least expensive product in this group. The latest Treo models, the 700p and 700w, are being sold by Verizon Wireless for $299 right now, after rebates.

The E62 works on the so-called GSM cellphone standard that’s universal in Europe, and used by Cingular and T-Mobile in the U.S. This means it can be used in both America and Europe, as well as in some other countries. The Treo 700 models, sold by Verizon and Sprint, and the Q, sold only by Verizon, use an American technology called CDMA that doesn’t work in Europe or in most places outside the U.S.

However, that GSM technology also saddles the E62 with its biggest drawback: It is much slower at receiving data such as email and Web pages than the Q or the Treo 700, or even certain BlackBerry models. That’s because it uses EDGE, a GSM variant that has been blown away by a technology called EVDO used by the Treo 700 and the Q. In my tests, EVDO has been up to seven times as fast as EDGE.

The E62 also lacks a camera, unlike the Q and the Treo 700. But, like them, it has Bluetooth wireless technology.

Nokia has built in a sharp, vivid screen with a resolution of 320 by 240. That’s better than the resolution on the Treo 700w and identical to the Q’s screen resolution — but inferior to the resolution on the Treo 700p.

The new Nokia is a bit larger than the Q — wider, thicker, longer and heavier. But it’s thinner and lighter than the Treo 700, albeit a bit wider and longer.

In my tests, the voice quality of the E62 was very good. Battery life was decent, with a talk time of between four and 5.5 hours. The phone accepts memory cards for storage of files and applications.

The BlackBerry Connect service and software, likely to cost around $45 a month, worked well. After I installed the BlackBerry software on the new Nokia and configured the service on the E62 and on an accompanying Web site, the service “pushed” all emails from my regular account to the E62 reliably. There’s no limit to how much email you can receive, though the carrier may intervene if it believes you are abusing the service.

The only downside of the BlackBerry Connect feature is that there’s a noticeable latency when you open an email before it displays on the screen.

In my tests, the N62 could open most major email attachment types, including Word documents, Excel spreadsheets and Adobe PDF files. It’s also supposed to work with PowerPoint presentations, but in my tests, this function failed.

The user interface on the E62 isn’t nearly as fast or slick as on the Palm operating system used by the Treo 700p. But I preferred it slightly over the Windows Mobile operating system used on the Treo 700w and some other smart phones. There were still too many menus and extra steps compared with the Palm system, but at least you can delete an email with one click. Turning on the speaker phone was also quick and easy.

I was able to synchronize the E62 with Microsoft Outlook, and bring over my contacts and calendar, using the separate Windows software that comes with the phone. And I was able to load up the memory card with pictures and songs from my computer and use them successfully on the E62.

All in all, the E62 is a solid and inexpensive smart phone.

• Email me at mossberg@wsj.com.

The standard BlackBerry hand-helds from Research In Motion make clunky phones, and the slimmer BlackBerry 7100, while an acceptable phone, lacks a full keyboard. The models using Microsoft’s hand-held software have either lacked keyboards altogether or been too large to make comfortable phones. In contrast, the Treo is both roomy enough to be a good hand-held email device and compact enough to be a good phone.

Starting today, Verizon Wireless will introduce in the U.S. the first Microsoft-based smart phone with a built-in keyboard that is about the same shape, size and weight as the Treo. This new phone, the $599 Samsung i730, has one major capability the $399 Treo lacks — the ability to surf the Web and to send and receive email at broadband speeds.

The new Samsung can operate at speeds roughly comparable to home digital subscriber line, or DSL, connections through Verizon’s wireless Broadband Access network, which works on a wireless technology called EVDO. Or it can use speedy Wi-Fi wireless networking at places like coffee shops and airports.

I don’t expect to see an EVDO-capable Treo until very late this year or early in 2006. And the Treo lacks Wi-Fi capability. So the Samsung is the fastest email and Web device with a built-in keyboard that is small enough to be used comfortably as a phone. It will be available starting today for corporate customers and will be in Verizon stores in a couple of weeks.

Samsung i730

I have been testing the new i730 and comparing it to the Treo 650 from Sprint that I carry as my own phone. The Samsung worked as promised for making voice calls, accessing Web sites, and sending and receiving emails. It also played music and videos and displayed photos, though unlike my Sprint Treo, the configuration Verizon sells lacks a camera.

In my tests, I was able to get on the Web with the i730 at speeds ranging from 220 kilobits a second to 534 kilobits a second, which is between three and eight times as fast as the Treo’s average speed of 70 kilobits a second. And that was on the Verizon EVDO network, which is available in most major U.S. cities. Using the phone’s Wi-Fi capability, in my home and at a hotel, I was able to push the speed to nearly 700 kbps.

There were some things about the i730 that drove me nuts compared with the Treo. It has much worse battery life. The Microsoft Pocket PC software it uses is much harder to navigate one-handed, as phones should be used, than the Palm software on the Treo. Even when doing simple tasks, i730 users will have to employ the stylus, and two hands, far more often than Treo users do.

Unlike the Treo, whose keyboard is always visible beneath a square screen, the i730’s keyboard is hidden beneath its rectangular screen and slides out for use. The keys are a little more widely spaced than the Treo’s, though they are flatter and less pronounced. I found typing on the i730 to be about as fast as on the Treo.

The new Samsung isn’t quite as small as the Treo, but it is close. With its keyboard tucked out of sight for making phone calls, it is slightly narrower than the Treo but slightly thicker and longer. It also weighs a bit more. However, when the Samsung’s keyboard is slid out for writing email, it becomes far longer. To dial a call without the keyboard extended, you have to use a virtual number pad on the screen.

The i730’s screen is larger, but it offers less resolution than the Treo’s. Both phones use a five-way navigation pad, four buttons for calling up various functions, and traditional red and green buttons for starting and ending phone calls.

The Samsung has 64 megabytes of memory, double the Treo’s internal capacity, though this is offset by the fact that its Microsoft software needs more memory than does the Treo’s Palm software. Both phones accept standard SD memory cards. I was able to pop the memory card from my Treo into the Samsung, and it played or displayed the music and photos I had stored there. Unlike the Treo, the Samsung has stereo speakers.

Like the Treo, the Samsung offers Bluetooth wireless networking, a short-range technology for use with some cars and wireless headphones and for synchronizing data with PCs.

In addition to its increased need for the stylus and two hands, the i730 has some other drawbacks. In my tests, its standard battery died in far less than a full day and far faster than my Treo’s battery, which typically lasts me for a whole day of moderate phone-call use and heavy email use.

You can’t use the Samsung’s Wi-Fi and cellphone capabilities at the same time, and it can’t hand off your Internet connection from one wireless technology to the other. And, unlike my Sprint Treo, the Verizon i730 can’t be used as a modem for a laptop. These limitations probably stem more from business decisions by Verizon than from technological limitations.

Finally, the i730 is $200 more than the Treo 650. But if you prefer Microsoft’s software to Palm’s or crave having wireless broadband in a phone, the Samsung i730 is a good choice.

Write to Walter S. Mossberg at walt.mossberg@wsj.com