A family member of mine purchased an unlocked iPhone XR today, upgrading from a Verizon iPhone 5c. Apparently the person at the Apple store gave them a new Verizon SIM card because they said one in their iPhone 5c was 'too old' and 'might limit the features and capabilities of the phone'. Is that possible? I know the iPhone 5c and iPhone XR both use nano SIM cards, so there is no form factor issue... But other than that, a SIM card is a SIM card, right?