/e/OS Version Upgrade

Manually upgrade kuntao to R

Caution: Downgrading Smartphones already on Android S or LineageOS 19.x to R or older OS versions can cause instability or at worst brick some devices.
Warning: Please note this upgrade build could not be tested as there were no device specific testers available. Some devices may need a revert to stock ROM prior to upgrade. To flash the stock ROM you would need to use a tool provided by your vendor. You may also need to download a recovery image built specifically for your device.

Basic Requirements

  • adb and fastbooot should be setup and working on your PC

    To set up adb follow details provided here

  • adb and fastboot need root rights in Linux and administrator rights in Windows.

    In Linux prepend sudo to any adb or fastboot command For e.g. “sudo fastboot reboot” and in Windows start the command window as administrator.

Caution: Before following these instructions please ensure that your smartphone is on the latest Android firmware available for your device. For example if available, before flashing /e/OS ‘S’ install Stock Android 12. Similary before installing /e/OS ‘R’ it should be Stock Android 11 or before installing /e/OS ‘Q’ it should be Stock Android 10. Check you device vendor’s website to download the required Stock ROM.

Downloads for kuntao

  • Custom recovery (not required if you already have it running on your phone)

To understand the difference between /e/OS builds check this guide

Warning: Please note some of the above links can lead to external sites

Manually upgrading your kuntao to R

  1. Download the /e/OS installation package as linked in the Downloads for kuntao section in this guide.

  2. Make sure your computer has working adb. Setup instructions are linked in the Basic Requirements section above

  3. Open a console window on your computer. The next set of commands will be run on the console.

  4. Reboot into recovery by running adb reboot recovery, or by performing the following:
    • devices.hold_volume_down_up_power
  5. Wipe your data partition (this is usually named Wipe, or Format)
    Warning: Without this step your device will not boot on the new version!
  6. Run adb reboot sideload.
    Warning: The device may reboot to a blank black screen, this is a known bug on some recoveries, proceed with the instructions.

  7. Run adb sideload /path/to/zip (inserting the path to your /e/OS package).

  8. Once you have installed everything successfully, run adb reboot.

Please share your experience , suggest tips or changes to this install guide documentation by visiting the P2 specific topic on our community forum.

To report issues in /e/OS please refer this guide

Answers to some questions you may have on the process

Why do I need to manually upgrade the OS

  • The updater app does not support upgrades from one Android version to another. It will hide any update of a different version.
  • We are working on resolving this issue.
  • While this issue is resolved, users need to manually upgrade their OS.
  • Upgrading manually requires similar steps to installing /e/OS for the first time.