I have an Alltel Motorola RAZR V3a. I would like to have it unlocked, but there is not a number underneath the battery that says IMEI. Which one is it? Also, where I live now, Alltel has been taken over by Verizon. I don't have service, and I'd like to change my phone over to Straight Talk. They use the RAZR, too. Can anyone help me???