Glad to have you Jill. I have the WiFi version as well, but from phone experience, I would suggest comparing your Nexus 7's mobile access to another device, like a smart phone at the same location and testing the Nexus 7 at various locations, noting the single strength, just for a start. Also you may want to have your mobile service provider, check the tablet at their location. Possibly, some members who have a Nexus 7 with mobile service will have some better suggestions.
Sent from my Nexus 7 using Tapatalk 4