PROBLEMS WITH BLUETOOTH CONNECTIVITY
Here’s what you can do to resolve both Wi-Fi and Bluetooth problems in one fell swoop: Go to Settings > General > Reset > Reset Network Settings. It’s the third option down, and you’ll want to avoid Reset All Settings and Erase All Content and Settings. By selecting “Reset Network Settings” you’ll keep your data intact, but your Bluetooth/Wireless connects will be back to their default settings. That usually solves your issue.