AT&T Galaxy S7 and S7 edge Gets Wi-Fi Calling, Advance Messaging Update (UCU2APG1)

The Wi-Fi calling support for AT&T Galaxy S7 and S7 Edge is finally here. In addition to Wi-Fi calling, the update also includes the AT&T Advance Messaging to which brings the Internet Protocol Message Enabled (IPME), and the Messages Backup & Sync feature. The update also carries the Android security patch containing the month of July patches. The update will bump up the Galaxy S7 Android OS to build version number MMB29M.G930AUCU2APG1, whilst the Galaxy S7 edge will move to build version MMB29M.G935AUCU2APG1.

The following  is changelog released notes and the update's technical details.

What's New in UCU2APG1 Update:

  • Setup and Transfer
  • Wi-Fi Calling
  • AT&T Advance Messaging - Internet Protocol Message Enabled (IPME)
  • AT&T Messages Backup & Sync feature (AMBS) Phase 3

What are the Technical details:


AT&T Samsung Galaxy S7 (SM-G930A)
  • Android version: 6.0.1
  • Android security patch level: July 1, 2016
  • Baseband version: G930AUCU2APG1
  • Kernel version: 3.18.20-8575098
  • Build number: MMB29M.G930AUCU2APG1

AT&T Samsung Galaxy S7 edge (SM-G935A)
  • Android version: 6.0.1
  • Android security patch level: July 1, 2016
  • Baseband version: G935AUCU2APG1
  • Kernel version: 3.18.20-8575098
  • Build number: MMB29M.G935AUCU2APG1


The update is live via Over-The-Air OTA update and weighs at 597MB i size. The roll out will take place in stages, so it might arrive on some devices much earlier, while others might also be late.

How to update the Galaxy S7 and S7 Edge via Over-The-Air:


Before you download:
  • Connect your device to a Wi-Fi network first, or make sure it has a strong Wireless network connection.  This approach requires you to prepare a strong WiFi connection,  and so it might happen sometimes that one did not receive any software update notification messages; (1) If and when the device is out of range during the software update roll out  period, (2) Automatic update has been turned off in the device Settings.
  • Ensure your battery is fully charged before starting the software update. This is a must and very important part to get rid of some issues if ever the software update being interrupted due to a power failure.
  1. From the Home screen, tap the Menu Key > Settings > About phone > Software updates > Check for Updates.
  2. If your device finds a new software update, tap Download now. When complete, a screen will appear advising you that the new version of software is ready to be installed. Tap Install update.
  3. The device will power down and power back on. A screen will appear stating that the installation has been completed. Tap OK.
  4. You’ve successfully updated your software.

Source: AT&T  [1] [2]