T-Mobile asked to stop advertising ‘price lock’ guarantee that doesn’t lock your prices

T-Mobile has been asked to stop advertising its “Price Lock” policy for its 5G internet service just months after raising prices. On Monday, the National Advertising Division (NAD) recommended that T-Mobile discontinue or modify the claim to explain how it “differs from a ‘price lock.’”

The NAD is part of the nonprofit BBB National Programs that evaluates claims presented in the ads industry. AT&T brought the challenge against the Price Lock claim...