Your SIM card will be linked to your account and any data you use will be added to your bill. You can’t buy a data-only SIM instead of a voice and data SIM. It’s an add-on, not a replacement.

Want to install an extra SIM card in your smartphone? Here's what you need to do just that.

Regular and Micro-SIM cards are too big for the iPad or iPhone, but this trick enables you to cut down a SIM card to a Nano-SIM so it fits into an iPhone or iPad.