BB 9700 unlocked in USA from ATT to TMobile. Can make calls on TMobile when in a coverage area, but not in a Wifi only area.
Problem - I use WIFI in non-cellular coverage area. Phone resets to ATT Mobile Network (in managed connection setting). Spoke with tech support at BB, TMobile & ATT and still can't get phone to work in a no coreage area on Wifi.
I called BB tect support & was told that ATT doesn't offer calling over Wifi. So the phone will not work on UMA. It has to be a TMobile phone. Anyone know if you can change software of some of the setting to enable wifi UMA calling?