Okay so I think I'm going to switch to T-Mobile in the Fall when the new iPhone comes out, but the issue is that I'm a *heavy* mobile hotspot user. It appears that even the unlimited data plan only includes 500MB of mobile hotspot access. When I go through the steps to buy a phone, I don't see any options to add more mobile hotspot data. Am I missing something? Additionally, are mobile hotspot MBs calculated differently than other MBs? Right now on AT&T, my plan includes 5GB of data, and I believe that 5GB is shared between my mobile usage as well as my hotspot tethering. It appears that on T-Mobile these are calculated separately. Can someone confirm? THANKS!