I unlocKed my ATT iPhone 7 Plus and am now using it with TMO. I'm on the latest carrier update (ver. 28) and there's just some weird things going on with the service. I don't know if its the service itself from TMO or if its the phone. Examples: Texts are coming in delayed to my Apple Watch; when I miss a call, Apple Watch says that call failed even though it went to voicemail; both calls drop (sometimes) when denying a call-waiting call. Does it make sense to completely wiping/restoring the phone after unlocking it or that wouldn't make any difference...? Thanks.