No waiting tone/sound when calling and no busy tone/sound

[emva]

duplicate of:

No Ringback tone when calling with VoLTE

REPRODUCIBILITY : 100% BUILD ID = OS VERSION : 4.4.0.68 HARDWARE : X10 II UI LANGUAGE: german DESCRIPTION: Since I enabled VoLTE, I can’t hear a ringback tone when I call someone, even though their phone is ringing. PRECONDITIONS: Call someone EXPECTED RESULT: In my phone I should hear a tone, that indicates, that the phone of the called party is ringing. ACTUAL RESULT: Nothing to hear. Silence until the called party answers. ADDITIONAL INFORMATION: Xperia 10 II SFOS 4.4.0.68 Germ…