If you’ve bought an iPad with 4G/cellular capabilities (we discuss whether that’s a good idea in our 2015 iPad buying guide) or a new iPhone, you need to buy and install a SIM card. Here, we explain ...

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T-Mobile has started stocking the extra-tiny SIM cards that fit the iPhone 5 for those customers who want to bring their unlocked phone to the carrier. Availability — just like the iPhone 5 itself — ...

Last year, it became apparent that Apple was planning to introduce a new SIM card, even tinier than the micro SIMs it uses in the iPhone 4S and iPad. But now Apple is trying to push the idea through ...