I have a serious problem with my fairphone 2, which ran fine with the lastest Fairphone Open Release until yesterday. Yesterday unfortunately I deactivated the usb debugging feature by mistake and forgot to turn the feature on again. When I later restarted the phone, I was not able to start it anymore. I am also not able to access twrp anymore. The only thing that starts automatically when you turn on the phone is the fastboot mode.
When I connect the phone in that mode to my Computer (Linux Ubuntu 18.04) the phone is recognized perfectly when I type “fastboot devices”. I am also able to flash /boot a twrp image without errors. Nevertheless, twrp will not start regardless whatever i am trying to do. My guess was that it could have to do something with the disabled usb-debugging on the phone.
I am sitting here for hour now to find a solution and have read each related post I could find here with no result. I would very much appreciate any help or hint that helps me to bring my phone back to life. Thank you very much!
Thanks for you quick reply! I guess the volume button works fine, there where no issues at all with the button before. I can reinstall the OS with fastboot, but the system does not start after re-installing. The phone just remains in the fast boot mode again. My guess was it could have to do with the disabled usb debugging function may be?
just one additional remark: when I try to boot with the volume up button pressed the screen flashes several times showing appearing and disappering the fairphone logo. when I realease the button then the phone falls back to the fastboot mode / screen.
But I have no idea how to continue from this point now as I have no OS left on the phone. How can I bring an image on the phone again that just bootet into twrp wihout flashing. The only thing I have now is the twrp access with nothing else left on the phone? Can you help me? I would really appreciate any help I can get at this point!
You can’t really say that when all you get by turning on the phone is fastboot mode all the time, can you ?
If you have a working fastboot command, you should have adb, too.
With TWRP running, connect the phone to your computer via USB and see whether adb devices doesn’t give you an empty line (much like fastboot devices you mentioned earlier).
Then in TWRP choose Advanced, then ADB Sideload.
On your computer, you can then adb sideload filename (filename being the filename of the OTA file you downloaded).
yes, the command adb devices gives me the output: “List of devices attached
f65fb624 recovery” now. But I still do not get which file from the OTA download I should use. The OTA Download results in a zip folder called 19.08.1-sibon-fad0fe00-ota that contains when unziped different files and folders. So which file do you mean?