Costantly dropped calls

Xfinity mobile has been usable about 45% of the time for phone calls with anyone. Either the calls will completely drop, or will have audio lost for ~15 seconds at a time where neither party can hear each other. 

Have had Xfinity mobile for a few months now and it has been terrible the entire time. I am planning to switch providers at the end of the billing cycle to one that the phones will work if I can't figure out how to fix this.

I switched from Verizon to Xfinity to save money and I have regretted every phone call I have made since then.