Install /e/OS on a Nothing - Nothing CMF Phone 1 tetris

This guide installs /e/OS on your tetris. Read it through once before you start, so you don’t hit surprises partway in. Flashing is done at your own risk: /e/OS builds are provided as best effort, without any guarantee, and the /e/OS project takes no responsibility for the consequences.

Requirements

  • Back up your important data to an external storage device — some of the steps below format the phone, wiping any backup left on it.
  • Charge your phone above 50%.
  • Enable adb and fastboot on your PC — setup instructions.
  • Download every file listed in the Downloads section below before you start.
  • Use a real data cable — some cables only charge and can’t transfer data.
  • Enable USB debugging on your device — instructions.
  • Confirm your exact model in the Device Selector: where shown, hover the device name for the supported model number, and check it matches yours exactly.
  • Boot the stock OS at least once and check everything works — SMS, calls, and both over WiFi and LTE if available (some devices need VoLTE/VoWiFi used once on stock to provision IMS). Whatever’s broken on stock stays broken on /e/OS.
Warning: Log out of any accounts (Google, Samsung, Mi Account, etc.) set on the stock ROM before proceeding. Most vendors enable Factory Reset Protection (FRP): after a factory reset, a device that's still signed in will ask for the credentials of that account before it can be used again. Also remove any screen locks.

Downloads for tetris

official /e/OS A14

Not sure which one to pick? See official vs. community builds.

Unlocking the bootloader

These steps only need to be run once per device. Unlocking the bootloader will erase all data on your device — make sure anything you want to keep is backed up (see Requirements above). Not sure what unlocking changes on your device? See Bootloader relocking.

  1. Boot the device

  2. Enable Developer options

  3. From developer options, enable OEM unlock

  4. Reboot on fastboot by running the command in the PC console adb reboot bootloader

    Tip: All the console commands are run on an adb enabled PC and in the adb console.

  5. Ask for unlock with fastboot flashing unlock

  6. Approve with Volume Up

  7. Unlock critical with fastboot flashing unlock_critical

  8. Approve with Volume Up

  9. Reboot the device fastboot reboot

    • The device proceeds with a factory reset

Installing /e/OS

Windows users: run these commands in Git Bash, not in the default command prompt.

Let’s proceed with the installation:

  1. Unzip the file you downloaded from the link in the Downloads for tetris section above.

    unzip <fileyoudownloaded>

    Replace <fileyoudownloaded> with the name of the file you downloaded. You can also unzip it using a File Manager/File Explorer.

  2. Confirm that the folder where you unzipped the files contains the following:

    • bin-linux-x86 directory - which contains linux tools including fastboot and adb
    • bin-msys directory - which contains Windows tools including fastboot and adb
    • .img files - The .img files that are to be flashed onto the device.
    • flash_tetris_factory.sh - The installer script.

  3. Boot your tetris into bootloader/fastboot mode:

    • With the device powered off
    • hold Volume Up + Power.

  4. Open a terminal (Linux) or Git Bash (Windows) in the folder that contains flash_tetris_factory.sh — right-click inside the folder and choose “Open terminal here” / “Open Git Bash here”. Then make the script executable and run it:

    chmod +x flash_tetris_factory.sh && ./flash_tetris_factory.sh

    The chmod step may require root/sudo privileges.

  5. The device reboots automatically once all the required files have been installed.

Success: Congratulations! Your phone should now be booting into /e/OS.

Please share your experience , suggest tips or changes to this install guide documentation by visiting the Nothing CMF Phone 1 specific topic on our community forum. To report issues in /e/OS please refer this guide