Using latest Sipdroid 6.5:
1-Samsung A14 phone with very latest Android 14 with One UI 6.1
will not register with TLS (but OK on TCP)
2- Nokia T21 Tablet with Android 13
will not register with TLS (but OK on TCP)
3- Samsung Galazy Tab A with Android 11
will register with TLS
4-Blackberry Keyone phone with Android 8.1.0
will register with TLS
Any help on this would be much appreciated
Yes, we also noticed that an Oppo Find X5 on Android 14 refused to register on TLS, but registered on TCP, while an Oppo Find X2 Pro on Android 13, and an Oppo Find X7 Ultra on Android 14 registered fine on TLS.