If you've just got your hands on a shiny new Sim card, congratulations. Switching your Sim (the chip that dictates your allowance) can unlock huge savings. Now comes the crucial step of activating it ...
AT&T has confirmed in a statement that the new universal Apple SIM card in iPad Air 2 and iPad mini 3 becomes locked to the carrier after being activated on its network. It appears AT&T might be the ...