Why the T-Mobile app doesn't work with the $50 and $40 plan, it work with the $70 plan though. Anybody know why?

They want to sell the more expensive plans. I have an inexpensive plan that gives 6G per month (supposedly at high speed) - but it doesn't really give you that - it seems it slows down the service - Again, I'm sure that's so people will buy the more expensive plans, but most times I just use my WiFi and then the service is adequate....Show more