TWRP installable stock firmware packages for Fairphone 3

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I also faced similar issues as @AnotherElk updating from 105 to 110. Fairphone logo kept showing up, deployed 110 with different TWRP versions, 105 with both versions.
This is what I did:

  • on a stock 105 I installed the old TWRP.
  • installed magisk over TWRP
  • OTA 110 failed -> restored boot.img from magisk -> to no avail
  • I flashed the @k4y0z 105 dump using adb fastboot flash -> again the OTA fails (due to dsp.img?)
  • sideloaded the 110 version with the new TWRP -> did not get beyond the FAIRPHONE greeting. Factory reset in stock firmware not possible. This is also the point where the corruption message started to show up.
  • flashed the 105 dump again with adb fastboot, this time replacing the dsp.img.
  • now I got the screen with the four rotating dots, but nothing happens.
  • tried to restore a backup via TWRP, failed with E:extractTarFork() process ended with ERROR=255 -> now I get only to the bootloader.

Finally I flashed the 101 dump from here:
https://androidfilehost.com/?fid=4349826312261713361
using adb fastboot as described here, restored factory defaults and installed 110 OTA.

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