Debugging VoLTE over T-Mobile on *US* Zenfone 9
Hi all! Let me start by saying this is an absolutely fantastic phone BUT this lack of VoLTE is a major regression from my Galaxy S10E. I do see some threads about this here but nothing specific or particularly helpful.
Regulatory labels: USA, Europe, Japan
Build number: WW_32.2040.2040.23
T-Mobile is a major carrier here in the US and I can see this phone has the appropriate baseband for US carriers. The main symptom is that my mobile data connection drops every time a call comes in and every time I make a call. This has the added wonkiness of sometimes dropping incoming and outgoing calls altogether. I am pretty tech savvy so I can pull up ADB and do any kind of prying you need to assist.