My phone updated on Sunday to UI 7.0 and now my phone will not play audio on my car radio (ford sync). I can still make/receive calls, but if I play Amazon music, or TikTok, or YouTube, it repeatedly connects and disconnects. I tired restarting the phone and forgetting all my Bluetooth devices and re-pairing and still nothing.
It's possible that for some reason your phone and your car are not agreeing on the exact Bluetooth protocol version. The only way that I know of that you can experiment with that is to enable the developer options in the settings app on your phone. Here's the path: Settings>about phone>software information>build number.
Tap on the build number panel rapidly until the phone asks you whether you want to activate developer options. Agree to it.
Close out of the settings app.
Reopen settings app, and you should see at the bottom "developer options".
Scroll down a long way to "Bluetooth AVRCP version". You can choose an earlier version than the default, possibly 1.4 or 1.3.
If this doesn't work, you can take a look at some of the other Bluetooth settings, but caution! Make sure you take a screenshot of the way the phone was originally before you make any changes so that you can restore the previous settings.
If you don't feel comfortable making any adjustments, perhaps someone else will have an idea. You can also check to see whether there are any updates to the car's Bluetooth software. I suppose you would ask a Ford dealership in your case. Good luck.
These steps fixed the problem, but you will need to re-pair any Bluetooth devices after the reset (including all vehicles, headphones, etc.) and reconnect to any home or office Wi-Fi networks you need to use:
Settings --> General Management --> Reset(near bottom)--> Reset Wi-Fi and Bluetooth Settings
After the steps in bold above, restart the phone and reconnect to Wi-Fi networks and re-pair Bluetooth devices.
