I know that verizon, sprint and at&t have a locator feature that you can sign up for, but I am with t-mobile. I am buying a phone for my son who is 11, and would love to be able to have a locator service for him/ his phone. I dont care if i need to access the internet to do so.

Someone told me that there is some kind of sd card that i can put in his phone and I would be able to locate it, but after doing a search on the internet I couldnt find anything.

Please help me if you can

Nathan