Flashing /e/ on Fairphone 4 failed

Hello Community:)

Unfortunately I can’t get any further at a certain point when flashing /e/ to the fp4 and hope for your help.

I’ll list what I think has already been successful, maybe I’ve forgotten an important step.

  • adb & fastboot installed on Windows
  • IMG-e-0.23-r-20220413178020-stable-FP4.zip downloaded and unzipped to adb folder
  • enable USB debugging with this guide: Enable USB Debugging and OEM Unlock

Then according to the instructions:

  • Boot the device CHECK
  • Enable and connect Wifi CHECK
  • Enable Developer options CHECK
  • From developer options, enable OEM unlock CHECK
    • Get the unlock code from this site and enter it CHECK
  • Reboot on fastboot by running the command in the PC console “adb reboot bootloader” CHECK
    • Ask for “unlock with fastboot flashing unlock” CHECK
  • Approve with volume + then power FAIL

I think here is the mistake. 1x Volume+ leads me to the “POWER OFF” menu item, that can’t be right, can it? I also have the option “RECOVERY MODE” and “RESTART BOOTLOADER”

Can someone help how to proceed?
Thanks very much!

If I boot into the bootloader and flash the files via adb, the error message comes up in adb:

 C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash dsp_b dsp.img
 target reported max download size of 268435456 bytes
 sending 'dsp_b' (65536 KB)...
 FAILED (remote: Download is not allowed on locked devices)
 finished. total time: 0.016s

You’re flashing via fastboot (not adb).
The error message is created because you didn’t unlock critical partitions by typing fastboot flashing unlock_critical


The unlocking failed because my cable and/or USB port were unsuitable. I changed both, then it worked :slightly_smiling_face:

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