For the smartphone that does everything, you need a case that does even more. Such as turn your one iPhone into two. Meet the Krimston Two, described as “a 1 phone solution to a 2 SIM card problem.” ...

For foreign mobile phonesA model that has two SIM card slots and can switch lines when necessaryAlthough in Japan there is strong connection between mobile phone companies and handset manufacturers ...

Quite a few phones worldwide support the simultaneous use of two physical SIM cards, but not many US models do. In fact, most otherwise dual-SIM-capable phones see the feature disabled in the US ...

Depending on your mobile carrier, you might not have a choice, but there are plenty of good reasons why eSIMs are overtaking physical SIM cards.