near the SIM card slot, or even behind the battery. You'll want to remove it, and—if your phone has one—also remove the SIM card, since it contains your phone number and probably at least some ...

Use the provided tool to eject the SIM card holder from your phone. Remove the old SIM card from the holder. Insert your new SIM, and return the card holder into the iPhone. Make a phone call ...

but some might also have a spot for a MicroSD card and/or another SIM card, so add, remove, or swap any cards as needed. Once the cards are flat in their slots, you can slide the tray back into ...