I’m not sure if this is the right place to bring attention to it, but I have noticed some pretty stark differences between how Mint Mobile (a T-Mobile MVNO) operates on a device running /e/ (specifically the pre installed S9 and S9+) vs one running stock Android. I’ve posted a few different topics …

Mint Mobile on /e/ vs Stock Android

egx470 July 13, 2021, 6:12pm 3

This thread may be of help. To my knowledge VoLTE and VoWiFi still are not supported in /e/OS for the S9 or S9+, correct me if I am wrong.