Incoming calls to Xfinity mobile go straight to voicemail

So I have seen this issue brought up and wanted to give my experience on this. I have an intermittent problem where all my calls will go straight to voicemail. This can last for 1 hour or 8 hours. I have contacted the online support and spent hours with them troubleshooting and was told they would replace my sim card. After waiting a week, I was then told to go to the Xfinity store and ask for one. I went in and had the sim card replaced which did not work. The staff tried to call my phone and went straight to voicemail, so the next logical choice is say the new iphone  is bad. I was told to go to the iphone store and see if they would replace my phone. I finally got an appointment and they were very professional and checked my phone only to say they would not replace it as the problem was a network issue, not a phone issue. Back to the Xfinity store and got to talk to the manager who actually told me this was a known issue that there was no resolution for. He did say that they hoped that the upgrades being done to some of the towers may fix the problem but no guarantees. He suggested that since there was not fix known, I may need to move carriers if I could not live with the current issue.

So for you that have this issue, there is no fix...Sorry. Hopefully this will help in not having to go through all the same frustrations I just did and now having to return to my old carrier.. After paying for the new IPhone13 I just got.