Service provider: ATT/ATT Prepaid Anyone here have any experience with these? Paying for a service that is barely usable at home. Seems like we have signal but it is weak. Missed calls, dropped calls and I can hear the caller but they can not hear me. It takes 20 secs or more to connect an out going call sometimes. If you step outside the signal if significantly better. I don't own a huge house so its not that. Will WiFi (reaching here) interfere with cell service? It has been like this since the beginning of summer. ATT responses have been less than helpful. It is the same problem on several different phones - Huawei Mate 9, Huawei View 10, HTC 10, Samsung Note 4, Samsung Note 9 and Huawei Mate 20 Pro. I know all of those phone do not have signal issues. All have been updated. Help?