- Reset the pairing Bluetooth device to make sure that the information about the last Bluetooth devices is cleared. Refer to the pairing device's user manual to find reset instructions.
- Clear the paired devices list on your phone's Bluetooth settings and restart your phone.
- Make sure that your phone is not in Battery Saver or Flight mode.
- Then start the pairing process and initiate the connection. Instead of initiating the connection from the phone, you can also try initiate it from the connected device (or vice versa).
The connection might subject to interference from other technology communicate using radio waves, therefore try moving your phone slightly to make sure that the pairing devices are set to be visible to each other.