Just curious about the nano-SIM card tray and the obscurity of it in most of the resources available in Apple.com. Just got an iPad Mini 2 (in a promotion), running iOS 9.3, and wondering if many people use the tray and what for.
iPad Mini, iOS 9.3
The nano-SIM allows you to connect to a cellular data network should you choose to purchase a cellular data plan for your iPad.
http://help.apple.com/ipad/9/#/iPad9940e098
Of course, your iPad is not a cellular telephone, and cannot make or receive cellular telephone calls or SMS messages whether you use the nano-SIM or not.
About cellular data settings and usage on your iPhone and iPad - Apple Support
What does the nano-SIM card do on an iPad Mini 2?
