Install LineageOS on jflteatt

Basic requirements

1. Make sure your computer has adb. Setup instructions can be found here.
2. Enable USB debugging on your device.

Special requirements

Rooting your device

1. Download TowelRoot from here.
   1. Click the large lambda symbol to download the apk.
   2. Install and run the apk to achieve root.

Installing a custom recovery using dd

1. Download a custom recovery - you can download Lineage Recovery. Simply download the latest recovery file, named something like lineage-17.1-20200922-recovery-jflteatt.img.

2. Place the recovery image file on the root of /sdcard:
   • Using adb: adb push <recovery_filename>.img /sdcard/<recovery_filename>.img
   check

   Tip: The file may not be named identically to what stands in this command, so adjust accordingly.
   • You can use any method you are comfortable with. adb is universal across all devices, and works both in Android and recovery mode, providing USB debugging is enabled.
3. Now, open an adb shell from a command prompt (on Windows) or terminal (on Linux or macOS) window. In that shell, type the following commands:

   su
   dd if=/sdcard/<recovery_filename>.img of=/dev/block/platform/msm_sdcc.1/by-name/recovery
   

4. Reboot into recovery.
   • From the same shell, type the following command:

     reboot recovery
     

Installing LineageOS from recovery

1. Download the LineageOS installation package that you would like to install or build the package yourself.

   • Optionally, download additional application packages such as Google Apps (use the arm architecture).
2. If you are not in recovery, reboot into recovery:
   • With the device powered off, hold Home + Volume Up + Power.
3. Now tap Factory Reset, then Format data / factory reset and continue with the formatting process. This will remove encryption and delete all files stored in the internal storage, as well as format your cache partition (if you have one).
4. Return to the main menu.
5. Sideload the LineageOS .zip package:
   • On the device, select “Apply Update”, then “Apply from ADB” to begin sideload.
   • On the host machine, sideload the package using: adb sideload filename.zip

6. (Optionally): If you want to install any additional add-ons, repeat the sideload steps above for those packages in sequence.

   info_outline

   Note: Additional add-ons aren’t signed with LineageOS’s official key, and therefore when they are sideloaded, Lineage Recovery will present a screen that says Signature verification failed, this is expected, please click Continue.
   info_outline

   Note: If you want Google Apps on your device, you must follow this step before booting into LineageOS for the first time!

7. Once you have installed everything successfully, click the back arrow in the top left of the screen, then “Reboot system now”.

   warning

   Warning: Depending on which recovery you use, you may be prompted to install additional apps and services. We strongly advise you to opt out of installing these, as they may cause your device to bootloop, as well as attempt to access or corrupt your data.

Get assistance

If you have any questions or get stuck on any of the steps, feel free to ask on our subreddit or in #LineageOS on freenode.