I have a situation. I purchased the phone that was already unlocked. I inputted my my old cell phones
sim card which was T mobile. Shortly after the T637 would just turn off after an half an hour or so. The only way to get it back on was to remove the battery and pull out the
sim Card. After that I found a glbal reset selection and I chose it. Now it want recognize the
sim at all this is the error. Insert correct
SIM card. Will this have to be reflashed because I reset it. Or is there a problem with the
Sim or the Phone?? Please help