A contracted AT&T SIM card works in an AT&T Go Phone; the SIM cards are programmed to function on the AT&T GSM network. An AT&T customer under contract may purchase a Go Phone to replace a damaged phone and place the SIM card in the device.Continue Reading
An AT&T customer can choose to use the SIM card in a Go Phone through the remainder of the contract. When it is time to renew the contract, the customer can get a new phone through the AT&T Next plan or through a two-year contract.
For a customer choosing a prepaid option through AT&T, Go Phone offers the SIM Card Kit to activate unlocked devices on the AT&T network.Learn more about Mobile
A Verizon phone can work when using a SIM from a T-Mobile account. The model of phone and the carrier that one is switching to will determine whether moving SIM cards will work properly. Some cards are not compatible with particular services or may require special software on the phone.Full Answer >
A pay-as-you-go SIM card is only usable in a contract phone that uses GSM technology and has been unlocked. To unlock a contract phone, you need the unlock code for your specific model.Full Answer >
Activating an AT&T GoPhone requires turning the device on after the AT&T Go Phone has been assembled with the SIM card. The process is fairly simple, although it does require an Internet connection.Full Answer >
The error message "SIM card registration failed" indicates that the phone is having trouble reading the electronic information encoded on the SIM card. This problem is often simple to solve.Full Answer >