This is 4 in 1 kit, it can help your iphone 12 pro from Signal to Dual SIM standby. Replacement SIM Card Holder Slot Adapter for iPhone12pro , Spare Repair Parts Single card to double card, just need to change a card slot, save money for you Replace your broken Sim Card Frame Perfectly fits for iPhone12pro, if you don't know how to install , you can contact us by mail, we can send you the installing vedio