A friend of mine suggested that I “defragment” my computer every once in a while. He says it will boost performance, but he also said it will move my data around. I tend to be very organized as to where I put documents on my computer. Will defragmenting my computer jumble my files and put them into random places?

No. Defragmenting a hard disk doesn’t change or scramble the organization of files and folders that you have established. Your file organization should look just the same after defragmenting the disk. What defragmenting does is rearrange the location on the disk of the data segments that make up your files. In some cases, a single file like a word-processor document might actually be made up of multiple data segments, invisible to you, that are located in widely separated physical spots on the disk. Defragmenting tries to optimize the location of these segments so that the computer operates more efficiently.

I saw your review of Norton Internet Security 2009, and wonder what is the difference between this product and Norton 360?

Norton 360 has the same features as Norton Internet Security, but adds some additional ones, like online backup and PC “tune-up.” It also costs more. However, the current version of Norton 360 doesn’t include the improvements I wrote about in the NIS product that make it faster and less of a burden on your computer. Those are planned for a future version of Norton 360.

Can I use one of the new 3G iPhones as a wireless modem for my Apple laptop?

No. That function isn’t built into the iPhone and Apple yanked from distribution a third-party program that enabled using the phone as a modem. I suspect the reason is a business one, not a technical one. Cellphone carriers like AT&T typically take the position that connecting a laptop to their networks, whether via a data card or via a cellphone used as a modem, should command a higher monthly data charge than they typically levy for a cellphone alone.

You can find Mossberg’s Mailbox and my other columns online free at the All Things Digital Web site, http://walt.allthingsd.com.

The phone, expected to be the first of many to use the Android operating system, was largely designed by Google, and was built by HTC of Taiwan. It will be sold in the U.S. starting next month by T-Mobile, for $179 with a two-year contract.

Here are some first impressions of the G1, based on some experience with a prototype. This isn’t a full review; that will come later, when I’ve had a chance to use a more finished device.

Most importantly, the G1 complements its touch screen with a physical keyboard, the lack of which has made the iPhone a non-starter for some users. The G1′s keyboard is revealed when you slide open its screen. The keys are a bit flat, and you have to reach your right thumb around a bulging portion of the phone’s body to type, but it’s a real keyboard. And there’s also a BlackBerry-like trackball that supplements the touch screen navigation. I found typing on this keyboard to be OK, but not great.

A second big feature, or limitation, of the G1 — depending on your point of view — is that it is tightly tied to Google’s web-based email, contacts and calendar programs. In fact, you must have a Google (GOOG) account to use the phone, and can only synchronize the phone’s calendar and address book with Google online services. Unlike the iPhone, it doesn’t work with Microsoft Exchange, and it can’t physically be synced with a PC-based calendar or contacts program, like Microsoft Outlook.

So, if your world already revolves around Google services, you may find that the G1 fits like a glove. If not, you may be disappointed.

Also, like the iPhone, the G1 has a download service for third-party programs, called Market. I downloaded a couple of simple Market programs and they worked fine.

The G1 won’t win any beauty contests with its Apple (AAPL) rival. It’s stubby and chunky, nearly 30% thicker and almost 20% heavier than the iPhone. It’s a bit narrower — more like a standard phone than a “smart phone” — and longer, but has a somewhat smaller screen.

Still, it feels pretty good in the hand when closed, although I found it more awkward when opened.

But the software is slick. Programs appear in a virtual drawer you slide open via a tab at the bottom of the screen, and notifications of new messages and the like can be read by sliding the top bar of the screen down. The screen and software were quick and responsive.

The web browser is based on the same open-source technology as the iPhone’s, but works differently. You can view a portion of a page, and use a zoom control and finger-dragging to see the rest, or you can view the whole page in miniature, as on the iPhone. In the latter mode, however, you can’t simply use Apple’s technique of tapping or “pinching” to zoom in on a portion of a page. You must move around a virtual lens to pick out a part of the page on which to focus.

There are two email programs: one for Google’s Gmail, another for all other email services. There’s an instant messaging program, that works with multiple services — not just Google’s. And, as on the iPhone, there are programs for using Google Maps and Google’s YouTube video service. The G1′s Google Maps program has a feature lacking in the iPhone version: photographic street views of some locations.

The G1 has a couple of other things the iPhone omits: copy and paste functionality and a so-called MMS program, which sends photos to other phones without using email. Its camera is higher-resolution than the iPhone’s, but, like Apple’s, doesn’t record video.

It also gives you far more flexibility in organizing your desktop, or home screen, than the iPhone, or almost any phone I’ve seen. In addition to placing icons for programs there, you can place everything from individual contacts, music playlists, folders, web pages, and more.

The G1′s multimedia capabilities are less polished and complete than the iPhone’s. There’s a very basic music player, and a built-in version of Amazon’s MP3 download service that works fine. But the G1 lacks a built-in video player — you have to download one from the third-party software store. Also, you cannot use standard stereo headphones with the G1. You need special ones, or an adapter.

And it lacks the iPhone’s ability to change the orientation of a web page or photo by just turning the phone. You also can’t move through groups of photos by just “flicking,” as on the iPhone.

The G1 also has much less memory than the iPhone. The base $199 iPhone comes with 8 gigabytes sealed in, but the G1 comes with just a 1 gigabyte memory card. Its maximum memory, if you buy a bigger card, is 8 gigabytes, while the iPhone can be purchased (for $299) with twice that.

T-Mobile is claiming similar talk time to that of the iPhone, but, unlike Apple’s product, the G1 has a removable battery.

Finally, a word about networks. In the U.S., the G1 will initially only be available on T-Mobile, whose high-speed 3G network will be up and running in many fewer cities than those of its larger rivals, AT&T (T) and Verizon (VZ). Like the iPhone, the G1 does have Wi-Fi, Bluetooth and GPS.

In sum, the G1 is a powerful, versatile device which will offer users a real alternative in the new handheld computing category the iPhone has occupied alone.

This iPhone app lets you track the campaign anywhere you go.

Election ’08 contains the latest national tracking polls and performs an algorithmic calculation of who’s winning currently in each state based on multiple available polls in that state. Then, it generates an electoral vote projection. It also gives the sources of the polls, and provides recent and historical data for context.

Some iTunes commenters complained that the app’s polling data were stale, but today, it seems up to date.

The program, from a company called Chimp Software, lets you view the data in a variety of ways–most recent data, alphabetical by state, battleground states only, or in lists arranged by each candidate’s strongest states, in descending order (McCain is cleaning up in Utah, Obama is uncatchable in DC.)

If you care about politics, and understand that polls aren’t perfect, Election ’08 can put a snapshot of the political horse race in your pocket.

W. Blake Fischer, an analyst with Stifel Nicolaus, says that the big incremental winners in the new version of the phone appear to be Infineon (IFX) and Triquint (TQNT).

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On the official Palm blog, the company yesterday announced plans to start selling a new electric blue version of the Palm Centro at AT&T stores starting on Friday.

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Softbank (SFTBF), Japan’s No. 3 wireless provider, broke the news in a spartan press release that would do even Apple (AAPL), a company renowned for its minimalist gadgets, proud. If ever there was a one-button press release, this is it:

SOFTBANK MOBILE Corp. today announced it has signed an agreement with Apple® to bring the iPhone™ to Japan later this year.”

Well, there you go. Presumably, Jobs will fill us in on the details on Monday. In any event, lining up a wireless partner in Japan is an important step for Apple, which hopes to gain a 1% share of the global cellphone business by the end of 2008. Nomura Research Institute estimates that Apple can sell 2 million to 3 million iPhones annually in Japan–-about 5% of the market–if it plays its cards right.

Also announced this morning, a deal with Telefonica (TEM), which has agreed to distribute the iPhone in Spain through its Movistar subsidiary. Together the two deals bring the iPhone distributor count up to an even 70, with more countries presumably waiting in the wings.

(Image credit: AAPLinvestors)

Goldman Sachs’ David Bailey added the stock today to the firm’s “Americas Conviction Buy List,” and upped his price target to $220 from $185. Bailey said the move is intended to “capture the catalyst around the 3G iPhone launch next month and the upside potential from sharply higher projected iPhone sales in the back half of the year.” Bailey says he continues to see calendar 2008 iPhone unit sales at 11 million, ahead of the company’s 10 million unit target. He also expects continued stellar Mac growth, with units expanding at three times the overall PC market.

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One item worth noting which I missed yesterday: Piper Jaffray’s Gene Munster in an unusually cautious (for him) research note on Tuesday advised investors to keep their expectations for the capabilities of the 3G iPhone “in check.” He said the phone is likely to be nearly identical to the current iPhone in form and function.

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The device is largely as expected–an iPhonish-looking thing with both GPS and Wi-Fi, 1GB of permanent flash memory, a 2-megapixel camera, full HTML browsing, 3G support on GSM networks with HSDPA access and, of course, the BlackBerry’s one-trick killer app: instant, secure email. That’s a compelling combination for business users and casual ones not easily swayed by the iPhone’s hype juggernaut as well. Indeed, Citigroup analyst Jim Suva says it could boost RIM’s quarterly shipments by 200,000 to 400,000.

But perhaps not without a bit of struggle. The BlackBerry Bold won’t ship until as late as August, which means Apple (AAPL) could beat it to market with the enterprise-friendly 3G iPhone it’s rumored to be uncrating at its Worldwide Developer’s Conference in June. Which has got to worry RIM. After all, the first-generation iPhone had claimed a 28% market share by the fourth quarter of 2007. That’s still less than the BlackBerry, which holds about a 41% market share, but the iPhone hasn’t even been on the market a year.

Last Friday, Digg founder Kevin Rose, whose “Diggnation” videocast has become a sort of Psychic Friends Network for Apple rumors, claimed the next-generation iPhone would include two cameras and support for video chat. A few days later he added that the device will also run on a faster 3G network, include GPS and ship in June.

Now Gartner Group analyst Ken Delaney has joined in the handicapping, speculating that the device will boast an organic light-emitting diode display that will make it thinner and reduce power consumption. Delaney says the iPhone’s somewhat disappointing performance in Europe has forced Apple’s hand, inspiring it to fast-track the 3G phone and place an order for 10 million of the devices from its manufacturing partners in Asia.

Could it be that Apple is planning to announce the 3G iPhone at WWDC, with an eye toward an official release on June 29, the first anniversary of its predecessor’s debut?