Is downgrade Oreo -> Nougat possible?
I'd like some cool features of custom roms, but I also like some cool bloatwire from Hydrogen OS, like magic parsing of SMS authorisation and built-in apps for banks and such.
So I'd like to try custom Oreo, and if it turns out to be inconvenient, I want to return to the last Hydrogen.
Is it possible? Doesn't Oreo somehow irreversibly patch the firmware, making Nougat crash?
---------- Post added at 03:28 AM ---------- Previous post was at 03:22 AM ----------
Also, how do custom ROMs deal with safetynet/dm-verity?
Hydrogen passes the safetynet check if it manages to connect to Google. [VPN is needed]
Which custom roms pass this check? Does disabling dm-verity mean failing the check?
I think using unbrick tool can put you back on 4.7.4. Check out another thread.