P.S. I live in Appalachian mountains where I am constantly roaming on Appalachian Wireless. They did partner up with Verizon to get 4G LTE so I suspect when I am on 4G, I am on Verizon network. I don't know if roaming makes any difference.
I recently upgraded to Baja ROM from rooted JB stock and ever since have had problems switching to 3G from 4G. If I turn my phone on in a 3G area, 3G data works. However, if I travel to a 4G area and the phone connects to 4G, when I return to a 3G area, 3G data no longer works. The notification bar has a grey out 3G (wifi is off). Voice still works. I cannot get data again unless I either go back to a 4G area or reboot my phone. Turning on and off airplane mode doesn't help. Does anyone else have this problem? I have tried various modems, including NC4, NC2 and MJE. They don't seem to make any difference. Anybody have any suggestions? Thanks for you help in advance.