I tried to update to Android 9 using the updater app.
Update started, lots of restarts and finally endless loop restart - “no command” - restart again. Image with “dead” Android man lying on the ground and text “No command” on the screen.
What I tried:
Manual Update, bootloader
Manual Update as described in Manually install Fairphone OS for the Fairphone 2 – Support
Power On/Volume down seems to get in bootloader (fastboot) mode (blue LED flashing) but flash-for-windows.bat says “no device found in fastboot mode” and fastboot devices shows no device (FP2 is connected with USB)
Power On/Volume up twice gets me in boot menu. I can choose for adp, but the only possible mode here is sideload.
I tried to install different Fairphone and /e/ images (from Fairphone OS downloads for Fairphone 2 – Support and /e/ documentation | Welcome to /e/ documentation! Download, install and compile /e/OS for your android smartphone Main website Community forums) with adb sideload [name].zip, but in all cases I get two errors: “footer is wrong” and “signature verification error”. According to the /e/ documentation I should install TWRP to avoid that, but that is impossible because bootloader does not work. “adb reboot bootloader” also gets me to the mode with flashing blue LED and “fastboot device” empty.
I used fastboot both from the Fairphone installer and also from a fresh install (version 31.0.2), same result.
Boot menu also allows me to “apply update from SD card”. So I copied the zip-files to the SD card but got the same “footer is wrong” and “signature verification failed” as with ADB sideload.
Last option was a factory reset, allowing to wipe the data. Since I have a backup this is not a big problem to me. But it dit not help. My FP2 still is not booting (endless boot loop “no command”)
Anybody any idea to get out of this?