I posted this elsewhere but no one has been able to answer it. My Dad has an original iPad with unlimited data. Since he doesn't use the 3G all that often he offered it to me. So, here are my questions. 1. Will I still be able to turn the Data plan on and off when I need it, or will I have to pay month-to-month to keep it from lapsing? i've heard people mention the 'lapsing' but don't quite understand it. 2. Can I change the payment info without it lapsing? 3. Will this work with LTE or only HSPA+ / HSDPA? And lastly, is all I need to do switch out the sim cards? Thank you!