AT&T Galaxy S4

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AT&T Galaxy S4 and S4 Active receive updates to fix Stagefright bug, build no. I337UCUGOC4 and I537UCUCOC7 respectively

Back to Stock: Bring AT&T Galaxy S4 SGH-I337 to Android 4.3 Jelly Bean with Official Firmware VRUEMK2

Download / Install The AT&T Galaxy S4 SGH-I337 Android 4.4.2 KitKat OTA Update [I337UCUFNB1]

PhilZ Touch Advanced CWM Recovery For Samsung Galaxy S4, S4 LTE, Google Edition, AT&T, T-Mobile, Verizon, Sprint, US Cellular, Cricket, Metro PCS, C-Spire, China Mobile and Canadian Variants

How to Downgrade AT&T Galaxy S4 SGH-I337 to Android 4.2.2 Jelly Bean [Back To Stock]

Get AT&T Galaxy S4 Android 4.4 KitKat via VanirAOSP ROM (4.4.2) with Heavy Metal theme, Halo 2.0, PIE, Appbar, etc. Features

AT&T Galaxy S4 SGH-I337 gets KitKat Update (Android 4.4.2) via OmniROM too, Build KOT49H