Samsung Galaxy S6 and Samsung Galaxy S6 Edge users with the AT&T carrier are still waiting for the Android 5.1.1 Lollipop update. This is in sheer contrast to the T-Mobile, Sprint, Verizon and the US Cellular carriers as they have already released the Android 5.1.1 Lollipop update to their users.
There are speculations that due to the innumerable delays by AT&T in launching Android 5.1.1 Lollipop to their Samsung Galaxy S6 and Samsung Galaxy S6 Edge users, the carrier may directly skip to the Android Marshmallow update.
Android Marshmallow will be released in October along with Google Nexus 5 2015. Both Samsung Galaxy S6 and Samsung Galaxy S6 Edge are confirmed to receive this upgrade.
Samsung launched two high end phones, namely the Galaxy S6 along with the dual edge curved version of it, the Galaxy S6 Edge with Android Lollipop 5.0.2 out of the box. Soon after the launch, Samsung also rolled out the Android Lollipop 5.1 for many of its devices. The Android Lollipop 5.1 over the air update is rolled out for Samsung Galaxy S6 and also Samsung Galaxy S6 Edge.
T-Mobile was the first one amongst all to receive this operating system upgrade for Galaxy S6 and Galaxy S6 Edge. It includes support for RAW photography and also lower ISO settings. The upgrade will also bring the base band version to G920TUVU2COF8 for Galaxy S6 and to G925TUVU1AOF8 for Galaxy S6 Edge.
Sprint also released the upgrade in July. For Galaxy S6, the build number is G920VPU20F7, and for Galaxy S6 Edge, the build number is G925PVPU2B057. Both of this build upgrades weigh about 570 MB in size.
Verizon released the upgrade last month for both the devices, according to Android Pit.
For US Cellular carrier, the upgrade is already rolled out. The build versions for both the devices are G920R4TYU2BOF7 and G925R4TYU2BOF7, according to US Cellular.