I have a Max Duo ZTE the only problem is I cannot upgrade it and when I try it tells me it cannot connect to server even though the phone has full service 4G I don't know why
Wow that's ridiculous, no wonder why I haven't been able to connect to the server.
If you are on any of the Tracfone affiliates, Tracfone will not allow you to update the OS in your phone. Yours is the same message I was getting when Tracfone gave me that answer.