http://www.siemensjobcam.com/mobile-customer-phone-number/
"I can port my number from T-Mobile prepaid AT & T?
I bought a T-mobile sim to go as I was only going to be in New York for a few months for business. Since then I have given my number to a lot of business contacts, but is costing me a fortune in phone calls, and my stay has been extended. I have also data capability. I want to change to a package of AT & T GoPhone, but I keep my number. If T-Mobile give you a PAC code for a phone Prepaid? The t-mobile customer care can not tell me. I tried the Web site AT & T, who says I'm eligible, but gives no reason why. Does anyone has been able to do this? Thanks:)
My son was in Boston recently for business and it cost him a fortune on your mobile, I asked why not change AT & T said it tried but couln't get it right.
How Do I Track A Cell Phone Number?