A promise of 20% savings over AT&T and Verizon didn't adequately explain that those cost savings factored in streaming perks, the National Advertising Review Board finds.

T-Mobile has been asked to take down its misleading "Switch and Save" ads that claim that its plan prices are cheaper than Verizon and AT&T.

T-Mobile is on such a roll that things like this don't even matter The problem with the wording is that it isn't a straight 20% savings off the service itself, but T-Mobile is also including all its bundle packaging for streaming service perks,