Install /e/OS on a Gigaset GS290 - “GS290”

The instructions in this guide will assist you to install /e/OS on your GS290. Please read through the instructions at least once before actually following them, so as to avoid any problems later.

It is advisable to flash your device only if you know what you are doing and are ok taking the associated risk. All /e/OS builds are provided as best effort, without any guarantee. The /e/OS project and its project members deny any and all responsibility about the consequences of using /e/OS software and or /e/OS services.


  • If required take a backup of all important data from your phone on an external storage device before proceeding.
  • Do not take a backup on the same device as some of these actions will format the device and delete the backup.
  • Ensure your phone is charged more than 50%
  • Check that adb and fastboot are enabled on your PC. If not you can find the setup instructions here
  • Download all the files and images mentioned in the download section below before starting the installation
  • Make sure you have a working data cable to connect your device to the PC. There are cables which are only for charging and do not transfer data.

  • Enable USB debugging on your device. You can find the instructions here
  • Make sure that your model is listed in the Smartphone Selector. Check the model supported. Where available, information on the model supported should show as a pop-up when you hover the cursor on the Device name. The model number supported should be the exact same.
  • Boot your device with the stock OS at least once and check every functionality.
Warning: Make sure that you can send and receive SMS and place and receive calls (also via WiFi and LTE, if available), otherwise it will not work on /e/OS as well. Additionally, some devices require that VoLTE/VoWiFi be utilized once on stock to provision IMS.

Please share your experience , suggest tips or changes to this install guide documentation by visiting the GS290 specific topic on our community forum.

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

Downloads for GS290

Try the /e/OS Recovery (limited functionality)

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

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

Before install

  1. Check fastboot version

    You do this by typing the below command in a console app on an adb enabled PC

    fastboot --version

    This would show a response like fastboot version 30.0.5-6877874

    Caution: Versions provided by Ubuntu or some operating system are not up to date, do not try to flash your Gigaset with it. Instead, follow the instructions given here
  2. Enable developer mode and following the instructions given here

  3. Unlock your device

Tip: The steps given below only need to be run once per device.
Warning: Unlocking the bootloader will erase all data on your device! Before proceeding, ensure the data you would like to retain is backed up to your PC and/or an online drive
Warning: Some vendors/manufacturers prevent the bootloader from being unlocked. Depending on where your device was acquired you may or may not be able to unlock the bootloader. To verify if your device is compatible please check the devices list.
  • Run these commands in an adb enabled computer console

    adb reboot bootloader

    fastboot flashing unlock

Tip: In case of issues with the latest fastboot version, try using version 30.0.5
  • On your phone screen confirm by pressing volume up

Install /e/OS

  1. Download and extract the /e/OS ROM

    You can unzip the files into the folder where you copied the fastboot files.

    Alternately you can create a folder and unzip the ROM there.

    In the second case the below commands will need the path to the folder where you unzipped the ROM files.

  2. Reboot in bootloader with adb reboot bootloader

  3. Run the following commands to install /e/OS

    these img files are available in the /e/OS zip you downloaded

     fastboot flash system system.img
     fastboot flash vendor vendor.img
     fastboot flash boot boot.img
     fastboot flash dtbo dtbo.img
     fastboot flash recovery recovery.img
     fastboot flash logo logo.img
     fastboot flash md1dsp md1dsp.img
     fastboot flash md1img md1img.img
     fastboot flash spmfw spmfw.img
     fastboot flash lk lk.img
     fastboot flash lk2 lk.img
     fastboot flash sspm_1 sspm.img
     fastboot flash sspm_2 sspm.img
     fastboot flash tee1 trustzone1.bin
     fastboot flash tee2 trustzone2.bin
     fastboot flash preloader preloader.img
     fastboot -w
     fastboot reboot
Success: Congratulations !! Your phone should now be booting into /e/OS !!
To find some troubleshooting tips… click here


  • Getting a Total xFer ':' 0.01x message - Try to upload the /e/OS to internal storage and retry to install
  • adb ':' sideload connection failed ':' insufficient permissions for device error - Try to execute the commands adb kill-server and adb start-server and retry
  • Running adb shell twrp install /sdcard/</e/OS zip package> raise non-existent directory error - Try to check solution here
  • Getting an insufficient permissions error - Try the solution given here
  • When running "adb devices" in bash a device is shown as "unauthorized" - Try the solution given here


  • Errors while running TWRP version 3.4.x.x or above - Try downloading and using a previous TWRP version.. below 3.4.x.x
  • In TWRP if this error shows up failed to mount /preload - Try in TWRP wipe screen in advanced menu select preload and swipe to wipe
  • /cache/recovery/xxx -> no such file or directory error while flashing a ROM - On PC run adb shell in the console now create a folder called recovery for e.g. here the devicecode name is violet "violet :/cache# mkdir recovery"


  • Trying to troubleshoot mobile connectivity issues - Read this guide

Please share your experience , suggest tips or changes to this install guide documentation by visiting the GS290 specific topic on our community forum.

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