We are thinking about getting my gf her own lte iPad. We will be going abroad for 2 months this year. I am going to setup a account with tmobile for my note 3 and use their unlimited international data/texting. I notice that I can add a line for only $40 more that will have unlimited data. Am I correct in assuming that I can just pop that sim into the iPad and use it? Do I need to change any apn settings or is it plug and play? This will also be a test drive of tmobiles service in America. I need flawless data and while I would love to leave AT&T I need to be sure first.