AT&T Galaxy S5 Active updated to official Android 5.0 Lollipop, root still possible with Flashfire

The rugged version of the last year Samsung flagship phone – AT&T Galaxy S5 Active (SM-G870A) finally getting an update to Android 5.0 Lollipop with software version G870AUCU1BOC5. Based on the update doc from the AT&T official website, it’s the second official updates provided by Samsung, the last update received was the NG3 version which only brings a few enhancements. For geek users, if you have previously been rooted, you still have a chance to keep root on Lollipop for AT&T Galaxy S5 Active through several procedures.


The official Android 5.0 update (OC5) for SM-G870A is a major software update, this can be seen from the huge update file size (1.4GB). Lollipop brings Google materialized User Interface that has a modern look and feel, and also more fluid motions. Not only its stunning UI, you can also expect better battery life so it will be ready for your active outdoor activities.

Regarding superuser access, it seems you can still get back the root on the AT&T Galaxy S5 Active running Lollipop. The main requirement is root access and never take the update via OTA, because you have to flash the stock rooted official update (OC5) using flashing tools, this is done when you still have superuser privileges.

at&t galaxy s5 active lollipop root

Image: Samsung/AT&T

The tools used is FlashFire – a Mobile Odin’s successor, it’s a mobile flash utility made by the CF-Auto-Root developer, Chainfire. Although the app is still in BETA stage, but many are managed to use it.


To download the stock rooted (OC5) firmware and how to use it with FlashFire, you can directly head to muniz_ri’s thread on xda forums.

If you are curious, here is an overview on how to get it done:

  1. Get the Flashfire app, however, it’s still BETA.
  2. Get the stock OC5 stock rooted firmware and extract it (stock firmware and partition file).
  3. Open Flashfire, wipe everything except the ‘internal storage’ and flash the firmware and partition.
  4. Once flashing done, the phone will reboot and hang up on the AT&T splash screen for 2 – 3 minutes before it’s fully rebooting.


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2 Responses

  1. kevin
    April 22, 2015 at 8:23 PMReply

    has anyone tried this?

    • Author

      Robbie S.
      April 22, 2015 at 9:36 PMReply

      Just head to dev’s thread @ xda forums, many have used the method. Thanks

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