Scenario in short:
I’m trying to install LineageOS onto a spare phone that I have. Hoping to get a daily driver out of it. The installation process requires me to install Android11 to install lineage on top of /over that. Which afaik isn’t directly available outside of some websites that I’ve never heard of.
For safety’s sake: would the install of lineage wipe the install of Android11? Or could there still remain backdoors?
Safe is relative but most liiely its wanting 11 because thats the version lineage you are using is based on.
As for these “some websites ive never heard of”… They might just be ai generated pages that hit on keywords common to android such as “root” and “custom rom”. Often they are scams that present instructions looking like they will work on phone models that dont have support for custom roms at all.
So be careful, make sure what you get comes from a decent source like android file host or xda, dont just go with random search results.