AT&T Samsung Galaxy S3 4.1.2 Update UCDMG2

AT&T Samsung Galaxy S3 (SGH-I747) 4.1.2 Jelly Bean I747UCDMG2 OTA Update Rolling

The Android 4.1.2 Jelly Bean update on AT&T’s Samsung Galaxy S3 (SGH-I747) has finally arrived. The new firmware version build numbers are I747UCDMG2  and recently rolled out  live via OTA (over the air). This is the ‘Premium Suite’ update that features the long-awaited ‘Multi Window’ support and other 4.1.2 stuff,

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