15. My mobile phone is using Android 13 or above system, the FIIO Control app could not connect to UTWS3?

1.After checking, we found that the BLE security mechanism of Android 13 has been improved, so the compatibility with some Bluetooth devices(not only our UTWS3) is having issue in Android 13.

2.UTWS3 has been discontinued, and modifications would require a reorganization of the software architecture. The problem cannot be fixed at the moment.

3.You could try whether the FIIO Control APP 2.6 version helps instead: https://drive.google.com/file/d/1EAMRMRhLbNAung5n8xDCfvYNaapPX0mI/view?usp=sharing