I'm running the latest version of GrapheneOS on a Pixel 6a using T-Mobile cell service in southern California. The problem I'm having is that when someone calls me, the phone never indicates that I'm receiving a phone call. Often times, I'll receive a voice mail from the individual who was calling me. This does not always happen, although most of the time it does occur.
I believe this is a GrapheneOS problem and not an issue with the T-Mobile cell service, because I am on a family plan with several other people, some of which use iPhone and they do not encounter this issue. Also, this was never a problem prior to a few months ago.
Also, if I receive a text message, it takes about a minute or more to receive the text, while the other people on my family plan receive a text message almost instantly. Again, this was never a problem prior to a few months ago, which leads me to believe that this is a problem with GrapheneOS.
Is anyone else experiencing this issue and if so, do you know how I can resolve it or if it's a problem with GrapheneOS? Thank you!