Before you have access to the APN settings in your device, you have to carrier unlock it from Metro. There are many online services available that can supply you the unlock code (for a fee). They all need your IMEI number, which is available by entering *#06# on the keypad (or looking on the label beneath your battery). If you don't know the info to enter for the new network, it is freely available online by searching "<carrier name> APN" :smokingsomb: