Thx! Sorry asking this newbee questions. Was reading a lot of information and I would like to have it all together before I actually start.
So as I understand now:
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installing LOS would not blow those efuses, ever, because I won’t be able to relock bootloader? Yes/no?
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when trying to revert to original android OS, I just need to do factory reset (this my ff4 would become as it is now: same android version and all) and then I could re-lock it, without risking eFuse blowing? Yes/no?
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I could choose to install those LOS version, that fairfone officially supports. Using later version of LOS (based e.g. on android 13) would risk some incompatibilities, but I could still reinstall the lower version (e.g. LOS based on android 11) that would be officially supported by fairfone? (without risking to brick it because of android 13 ->11 change bootloader security upgrade stuff) Because the bootloader would NOT be changed? Yes/no?
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I am confused now WHAT Lineage version fairfone officially supports: Fairphone 4 OS Manual Installation sais I need to upgrade it from 11 (currently) to 12 before I do a LOS install? I would not want this, just because I do want to leave it factory fresh as is, no simcard, no wifi connection setup etc. just some remote adb commands coming via PC and perform straignt LOS installation. Is that OK? or dumb? Now reading Official LineageOS 20 FF4 #157 “The security patch of FPOS need to be equal or higher of the security patch onf LineageOS to roll back and relock the bootloader.” which I understand as: I need to (MUST) upgrade my fresh Android11 “FPOS” to 12, thus pushing the security patch high enough, and THEN install LOS20, to be later able to factory reset (to FPOS12??? or 11?? ) and still be bale to re-lock boot loader without bricking? Oh dear, it is complex! please help!
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Since my ff4 currently has android 11 installed, when installing any open OS and panic and perofrm factory reset: where would the original android 11 (or with upgrade: 12?) OS be coming from? I fear that with A/B thing, repeated update of my LOS would overwrite the original factory fresh android 11 (12?) OS. Would I later still be able to factory-reset to original OS when sticking some years to LOS ( probably LOS with microG)? yes / no?