True Wireless Mode When you connect one side to the earphone, it will automatically share the audio between left and right. (True Wireless Mode) The earphone which is not connected to the phone cannot be paired with another device within the true wireless mode.
Monaural Mode You can individually pair your left and right earphone to the two different devices. In this case, the earphones become the monaural earphone. (Monaural Mode) This monaural mode may cause the problem when reverting back to true wireless mode or affect the pairing instability even in the true wireless mode. In that case, delete all of the pairing settings of your phone and restart and re-pair only one side of the earphone to the device. The earphone will automatically become true wireless mode and share the audio between left and right.
We recommend to delete the unnecessary pairing settings and keep it to one pairing at a time for the most stable connection.