Found an old phone, what options do i have

Hi All,

I found my old gen 1 razer phone. think id like to degoogle it and basically use it as a dumb phone/media player for the car etc with maps. but not really sure what options i have with regards to changing the OS? or what would be best to do..

im assuming andorid auto wouldnt work if i did this, but are there any work arounds?