If this phone is like my old Motorola 120c, the number won't erase until the phone is programmed with new service. I bought my Motorola on EBay, and the number didn't change until the phone was programmed for service with my number, and that's done at the wireless service's end.
my wife has an old Sprint PCS phone.
I was wondering, does anyone know how to remove the old phone number, so we can think about selling it. It has her old phone number in it, and she has taken her number to another carrier