FP2: Update via TWRP or obtaining stock recovery

I’m trying to update an FP2 from FPOS 19.11.2 to current FPOS.
I installed TWRP beforehand to create a backup. Unfortuantely that leaves me in a situation where I don’t know how to proceed in updating.

The Updater App suggests FPOS 21.12.0-rel1 (which I suppose makes sense in the recommended gradual upgrade path) and downloads it to a location unknown to me. It then restarts into recovery for the actual update and TWRP does not know how to handle it.

I would like to do one of the following (each of which I couldn’t find the necessary files to), in this preferred order:

  • Locate the image for FPOS 21.12.0-rel1 downloaded by the app (it’s not in /cache as mentioned in earlier Forum posts) and install via TWRP
  • Replace TWRP with the stock recovery (can I download it somewhere?) and let the Updater App do it’s thing.
  • Download the image for FPOS 21.12.0-rel1 manually from the web and install via TWRP
  • Anything else that let’s me follow the suggested upgrade path without loosing the data and config on the phone.

Welcome to the community forum.

You can download a recent install file here … https://support.fairphone.com/hc/en-us/articles/213290023-FP2-Fairphone-OS-downloads … and then open or unzip the ZIP file and get recovery.img out of the images folder.

You can also try to install manually. The instructions say “The user data will not be erased.” (but of course they recommend a backup beforehand) … https://support.fairphone.com/hc/en-us/articles/360018801738.