To update the software
  1. Make sure your device is sufficiently charged and connected to Wi-Fi.
  2. From the Home screen, tap Menu > Settings > AT&T Software Update > Check for Updates.
  3. Follow the on-screen prompts to download and install the update.
  4. The device automatically restarts once the new software successfully installs.

To verify the update
  1. From the Home screen, tap Menu > Settings > About phone. 
  2. The device has the latest software if the Baseband and Software versions match the current update details.