I want to update my FP2 to Android 6 (17.04.8), but as of now it seems like it’s not possible with the common methods using the TWRP zip install feature. Since the FP Updater App tries to boot into the stock recovery to install the update, it doesn’t work either.
Now I was wondering: Is it possible to uninstall TWRP, go back to the stock recovery, perform the update and reinstall TWRP?
There seems to be a solution to update with TWRP installed using fastboot, but I’m not super familiar with that, so I would prefer an easier method, even if it takes a little longer!
You can follow @retsifp’s advise, or download the package of the latest Android version here. Just unzip the archive, and you’ll find a recovery.img inside, which then can be flashed as described above.