This is going to be a very dumb question but I can't seem to get a straight answer from searching Google or the T-Mobile store. Yesterday, I became a T-Mobile customer. My wife and I have the iPhone 6s and we have the unlimited data plan. The guy at the store said that I shouldn't be throttled if I stay at around 40 gig per billing cycle. I read an article online and it said it was 21 gig. I then read another article and it said that you are fine as long as you don't tether. So what's fact and what's fiction?