revvl v +5g bluetooth

My wife and I each got the Revvl +5g as free options to switch to 5G since we've been long term customers.  Unfortunately, our two Revvls, like those comments above failed to connect via bluetooth to our 2018 Ford, though it worked with our 2014 Ford.  I sought help from T-Mobile and they talked me through doing a factory reset, but that didn't help, so after 40 minutes on the phone they finally said I'd need to wait for a factory upgrade from Android 11 to Android 12.  So, since that would takes us past the return option, with no guarantee that would solve the problem, we are returning them for phones that work, hopefully.  Since the bluetooth version on our 2018 is over 4 years old, seems like the Android 11 version is quite out of date.  Considering this string has been around for over a year seems like this problem should have been resolved already.