iOS 4 Compatibility Check

Will iOS 4 work for you? Check your model before download it:

• iPhone. Besides last year's 3GS, the new software will work with the 3G iPhone, released in 2008, but not with all features. For instance, multitasking and Bluetooth keyboard support won't work with iPhone 3G.

• iPod Touch. The new features are mostly operable only with the latest version of Apple's touch-screen iPod, the one released in late 2009. Multitasking doesn't work with the second-generation iPod Touch, released in 2008.

• iPad. Apple's latest hit — the hard-to-get iPad touch-screen tablet computer — doesn't get the iOS 4 update until later this year.

New iPhone Operating System - iOS 4

If you have a recent iPhone, you'll want to download Apple's new iOS 4 software update today.

Apple's iOS 4 software promises 100 new features for owners of the iPhone 3GS, released last June, including the ability to multitask, or run more than one app at once. It also lets you take control of the growing inventory of apps by organizing them into folders.

The software is being released today in advance of Thursday's 7 a.m. launch of the new iPhone 4.