I can basically answer yes to all your questions but the bluetooth car part. I don't use it in a car and I have bluetooth headsets but I don't think it used the mic of the headset during calls. This was also a problem on android for me. Also I never sent an mms, so no idea. SMS are more reliable than android for me

Battery lasts 24h+ for me

it's me. Works great as daily driver and many people in the UT community also dailydrive it. They also dailydrive the fp4 which is also a solid choice. A new big release is coming out (now in beta) which updates a lot of old components replacing them with qt6 and adds also many new features