I've had a bug since I've updated to 10.2.1 beta's that has driven me absolutely nuts. I've filed many reports on the feedback app and I'm extremely upset because Apple broke something that was working perfectly fine before and it's such a small issue that shouldn't be even present.
The bluetooth connection in my car is supposed to automatically to my phone when I turn the car on, but since this 10.2.1 beta seeds, the bluetooth connection seems hindered and won't connect by itself, UNLESS I put the phone in airplane mode and then off.
This is extremely frustrating and completely an unneccesary issue. Please fix this soon.