Install Android 5.0 Lollipop On AT&T Galaxy S5 Without Losing Root Access

Install Android 5.0 Lollipop on AT&T Galaxy S5 without losing root access. This is the best guide you can find not only due to the fact that your device will be rooted after installing a new firmware but also because it will not affect the KNOX warranty.

After updating AT&T Galaxy S5 to Lollipop, you can downgrade it any time because by performing the guide here you will update only modem, system, kernel and stock recovery. It will not update the bootloader so you can upgrade any time

Getting Ready

  • This guide is only for AT&T Galaxy S5 G900A. Do not try it on other variants of S5 or other devices because you may end up with soft bricked device.
  • Always do a backup before performing this guide. Even is something goes wrong you still have your files and restore them immediately.
  • Your phone must be rooted. To perform this guide and install Lollipop firmware on AT&T Galaxy S5, it must be rooted.
  • Charge your phone up to 70% so it will not go dead during the flashing process. If it goes dead you may end in a bricked device.

Rooted Lollipop 5.0 Firmware for AT&T Galaxy S5 G900A


I shall not held any responsibility for bricked device or any other trouble you may encounter to your device. Here at DoryLabs we only provide the guide but only you can decide to go further. So do anything at your own risk and don’t put the finger at me if anything goes wrong.


How To Install Rooted Lollipop Firmware On AT&T Galaxy S5

  • Download G900A OC4 Stock Rooted Firmware as well as G900A OC4 Stock Partitions wOA1 BL and put them on the internal memory of your phone.
  • Open FlashFire app on your PC and accept Term and Conditions.
  • Press the (+) sing twice to open the “Actions” menu.
  • Click on “Flash firmware package” and select the G900A_OC4_Stock_Rooted_Firmware.
  • Wait for FlashFire to scan the firmware. It may take few minutes.
  • Press OK to continue and once the md5 is confirmed, enure that both “Boot” and “System” are selected.
  • Press the checkmark to continue.
  • Press the (+) again after that press “Flash Zip or OTA” and select G900A_OC4_Stock_Partitions_wOA1_BL.
  • Under the options, uncheck “Auto Mount” and press the checkmark to continue.
  • Press (+) again to open “Actions” and then select “Wipe”.
  • Under the “Options” menu select all partitions expect “Internal Storage”.
  • Press the checkmark to continue.
  • From the main menu, tap, hold and drag your “Actions” and place them in the following order.
  1. Wipe
  2. Flash firmware package
  3. Flash ZIP or OTA

Use default settings under “EverRoot” and “Reboot” options.

In the end press the lightning bolt and then press OK to begin the flash. The screen will turn black and then it will display the contents of your system before beginning the flashes.

Once the installation process complete, the phone will reboot. It will pause for about two minutes on the AT&T splash screen. Once the phone completely reboot, you are done.

One comment

  1. I can’t find the G900A_OC4_Stock_Rooted_Firmware.rar, can you help?

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