How to get T-Mobile on any cellular iPad Air or Mini 200mb free data each month

What you need: Cellular iPad Air (A1475) or Mini with Retina (A1490) http://www.apple.com/ipad/LTE/ Unactivated T-Mobile Nano Sim Card (Search on eBay) I asked the Apple Store Staff to give me 1 for free. I was getting T Mobile ipad mini retina, but they did not have white in stock, therefore I got an ATT model, and asked the apple store staff giving me a free t-mobile sim card. Remember, to switch the sim card before you first start the iPad, by doing so, the iPad will let you setup the t-mobile sim card and activate it.