March Security update G920AUCS6DQC1 build for AT&T S6 SM-G920A is released [Tutorial to install]

AT&T is seeding Android 6.0.1 Marshmallow based March security update for AT&T S6 SM-G920A. The update brings nothing new except updates security patch and minor improvements but don’t worry you are going to receive the Nougat update soon.

As unlocked Galaxy S6 variant has already received stock Nougat update but carrier bonded device always took some delay. Till we recommended you to install this March security patch update on your device, the firmware brings build number G920AUCS6DQC1 and weighs about 20MB, it is an OTA update so right now the update is available via OTA or Kies but we have also mentioned the process to update via Odin as well.

If you think your device is un-rooted and fully stock then what are you waiting for go to Settings > About device > System updates. You can also update your AT&T S6 SM-G920A on Marshmallow G920AUCS6DQC1 firmware via Kies, here is the process to update your device via Kies.

If you are getting impatient to install the Marshmallow G920AUCS6DQC1 update for AT&T S6 SM-G920A just go ahead and follow the Odin process. We have already mentioned the same process for Samsung’s latest flagships as well as other variants of Galaxy S6 Edge Plus too.

Download links and firmware information!

Device Name: Galaxy S6 (AT&T)

Model: SM-G920A


Version: Android 6.0.1 Marshmallow

SPL: 1 March 2017

Region: USA

Size: 20MB

How to install G920AUCS6DQC1 Marshmallow firmware via Odin on AT&T S6 SM-G920A


Your device should be charged 70% at minimum to avoid shutting down during the process.

Download Odin 3.12.3 from here.

Latest Samsung USB drivers must be installed on your device.

Process to install G920AUCS6DQC1 Marshmallow via Odin on AT&T S6 SM-G920A

Now reboot your device into ‘Download Mode’ or follow this guide to see how to do it.

Once in ‘Download Mode’ then follow this guide to install Marshmallow G920AUCS6DQC1 firmware on AT&T S6 SM-G920A.

Download official Android 6.0.1 Marshmallow G920AUCS6DQC1 firmware.

The link will be available soon till then we recommend you to try the OTA or Kies method.

Give us your feedback about the improvements you see in the G920AUCS6DQC1 firmware for AT&T S6 SM-G920A.

Source: AT&T