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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 ...

After helping popularize the micro-SIM with the iPad and iPhone 4 in 2010, Apple is shrinking SIM card technology yet again with the coming iPhone 5. The new phone, which will be announced September ...

The iPad's Subscriber Identity Module connects the tablet to cellular data when Wi-Fi is unavailable. Unlike the iPad Mini, which uses a nano SIM card, the standard iPad uses a slightly larger micro ...