Starting tomorrow, the Samsung Galaxy S III won't be the only member of its family to use Google's Android 4.0 operating system on AT&T. The network will begin to roll out Ice Cream Sandwich updates to the Samsung Galaxy S II as well.

Unfortunately for AT&T customers, making the leap from Gingerbread to ICS will take a little more legwork than a simple over-the-air bump. You'll have to first visit Samsung's Web site from your computer, then download the Samsung Kies Upgrade Program to your desktop or laptop.

It seems a bizarre and cumbersome requirement compared with updating over data or Wi-Fi. It'll work on Windows (Windows XP, Vista, and 7) and Mac computers (OSX 10.5 to 10.7.)

For now, the update applies only to the Galaxy S II, not to the Samsung Galaxy S II Skyrocket.

Article updated at 9 a.m. PT with information on the Mac update path.