why do people believe this is possible? Apple will not allow one carrier to undersell the other on the SAME DEVICE...just won't happen it's bad for sales...which is why there is no competition between AT&T and Verizon...similar plans on voice text and data...otherwise everyone would play carrier swap every few month to get the best deal...if Tmobile gets the iPhone while still independent from AT&T you better believe you won't get unlimited everything for 70 bucks
Why wouldn't it be possible? Apple in no way dictates the plan pricing, just the hardware pricing. (although I believe they have fought for better data pricing, and mostly been ignored by ATT on that) Tmob is clearly cheaper in most standard calling plans. Data is the same price, more or less (the GB limits can differ), across all carriers, so that's not in question. Text plans are pretty similar, too. It's the phone plans that differ.
For instance, the base family plan from Tmob is $50, $60 from ATT and Verizon.
Not to mention that Sprint
does offer unlimited everything for a single line for $70. That is for any smartphone, some of which cost more than the iPhone, so why would the iPhone change that part of the pricing?