Bought phone from ebay can't use it

Answer 1

Check if the phone is unlocked or not. Check the frequency that the phone supports and compare it to the frequency that your service provider operates on. If it matches, then it maybe is a problem with the phone. However, if it does not match, then it you can't use the phone on that carrier. To know more about unlocking phones, go to - http://globalunlock.com/phones/