Samsung Galaxy S III - Manual (Page 147)

Changing Your Settings 141
Software Update
The AT&T Software Update feature enables you to use your
phone to connect to the network and upload any new phone
software directly to your phone. The phone automatically
updates with the latest available software when you access
this option.
1. From the Home screen, tap ➔ Settings ➔ About
device ➔ Software update.
2. Tap Check for updates.
3. At the Software update prompt, tap OK to continue.
4. The phone automatically updates the software (if
available), otherwise, when the Current software is up
to date prompt is displayed, tap OK.
5. When updating software, once the update file is
downloaded, you can delay the update on the start
screen by postponing it for a certain period of time. If
you want to resume the update before the selected
time, tap Continue update.