3. Why can't BTR7 be paired and connected to my phone? How to reset?

【Clear the pairing information on your phone】

Go to Settings-Bluetooth to delete the BTR7 pairing information and reconnect it to BTR7.
【Clear the pairing information on BTR7】
When it is on, hold both the volume- and volume+ buttons at the same time for about 5s.

【Reset operation】
Click the power button and the volume - button at the same time.