Happy Friday Everyone!
I have a late 2019 unlocked Android One phone (running Android 10) that receives strong T-Mobile LTE signal and everything generally works quite well. The VoLTE capability is visible in my OS menus and is "turned on" so it seems VoLTE is already baked into the OS. Despite this, the VoLTE does not work and the signal drops to H+ when I make (or receive) phone calls. Here are the questions I have: -
1. Any ideas why VoLTE is not working?
2. Is this a T-Mobile issue, or phone manufacturer issue, or Google issue, or a user error?
3. What can I do to get VoLTE work?
PS: Please note that this is an Android One phone so there are no "skins" nor "wrappers" installed by the phone manufacturer. Let me know if additional info is needed to answer the questions correctly.