The iPhone 3G hangs on to all the original iPhone features and throws in a few more, so we'll concentrate on what's new. Lucky for first-gen iPhone owners, most of the impressive array of additions--save 3G support and enhanced GPS--come along with the free 2.0 software update. For more on the organizer features, stocks and weather widgets, YouTube app, notepad, threaded texting, and visual voicemail, see our original iPhone review.

You'd be hard-pressed to notice any design differences on the front of the iPhone 3G. The minor changes--the silver rim is thinner and the silver mesh behind the speaker--are so minimal we didn't notice them for a few hours after picking up the device. Turn the phone on its side, however, and you'll see more changes. Apple has replaced the aluminum silver back with a plastic face in either white or black.

At 3.5 inches and 480x320 pixels, the display is the same size as its predecessor, but displays slightly more dots per inch (163 vs.160), and still cranks out brilliant colors, sharp graphics, and fluid movements. The layout of the home screen is identical to that on the first version, though you'll see two new icons from the outset: A Contacts icon takes you directly to your phone book, and the App Store icon opens the iTunes App Store. The display's glass surface, accelerometer feature, touch interface, and secondary menus remain the same.

In the box you'll find the syncing cable, a display cleaning cloth, a headset, user documentation, the aforementioned SIM removal tool, and an electrical outlet plug. The plug is pleasantly smaller than on the original iPhone's, but it's compatible with a standard USB cable.

When using Wi-Fi, e-mail syncing went quickly. As new messages came in, the iPhone registered them almost immediately. It seemed to bog down when we received a large clump of messages at one time, however. In those cases, we had to update the phone manually, but even then the connection could freeze. In one instance, an update took almost 5 minutes--long enough that we had to back out of the e-mail app and try again later. We also noticed that if the iPhone loses its Wi-Fi connection, the syncing is interrupted even if the phone has 3G service. The Syncing via 3G was just as quick; if there was a difference, we didn't notice it. But if the 3G connection is shaky, it will take longer.

The e-mail syncing is not without its faults, and it can't measure up to a BlackBerry just yet, but it is a good step toward making the iPhone a business device. Your experience will depend on how you use e-mail throughout the day. If you get scores of messages, and you must respond to each one, then we'd suggest holding off for now. But if you get scores, and only respond to a few (or you just get a few), then you could be perfectly content with the experience.

MobileMe
The iPhone 3G supports Apple's new MobileMe service, which synchronizes from Mac's Mail, Address Book, and iCal applications: contacts, calendar appointments, e-mail messages, photos, and browser bookmarks. One advantage of MobileMe is that it allows you to sync personal and work calendars, and contacts. Check out our MobileMe review for a full analysis.

App Store
When you select the iTunes Store, you're taken to the App Store main menu, which somewhat resembles the mobile iTunes store in design. You search applications by name and category and you can browse through the lists of Featured applications or the Top 25. There also is a feature for seeing if your purchased applications have any updates.

The mobile iPhone App Store.
We purchased a few apps for the iPhone. Downloads over Wi-Fi were pretty quick; most apps took just a few seconds, but keep in mind it will vary by the size of the app. Though you can purchase iTunes songs wirelessly only through a Wi-Fi connection, you can download applications of 10Mb or less over a 3G network and even over EDGE (if 3G isn't available).

Downloads over 3G took about the same time as they did over Wi-Fi, give or take a few seconds, but apps over EDGE are quite pokey. We also purchased applications through the online iTunes (7.7) store. We downloaded Super Monkey Ball and then synced it to our phone--a new applications tab appears under the iPhone menu. The process was quick and painless. What's more, navigation through the online apps store is easy. After loading apps, the icons will appear on the Home screen.