said by NO to ESPN :The answer is to prohibit streaming of video or other large files. Phones are for talking, texting, and some use of internet.
The same prohibition would apply to iPads and similar devices. There is no reason for someone to watch a basketball game on a phone or other portable device.
That is my opinion and your mileage may vary.
But it's not all about phones. Verizon is selling LTE service as an alternative to DSL. LTE phones use the same spectrum as the fixed LTE modems used to supplant DSL.