AT&T says any cell phone customer can sign up for unlimited data plans. That option had been limited to customers of AT&T-owned DirecTV.
The change came just days after Verizon announced an unlimited plan without such restrictions.
All four major cell phone providers now offer unlimited plans, a major reversal from a few years ago. AT&T's version costs the same as Verizon's — $180 — for a family of four but is pricier for an individual. Sprint and T-Mobile are cheaper.
[NATL] A Brief History of the Cellphone
Breaking news and the stories that matter to your neighborhood.
Sprint also said last week that it was letting unlimited customers watch video in high definition rather than DVD quality. T-Mobile announced a similar change after Verizon said HD video was included. AT&T's unlimited plan degrades video to DVD quality, but customers can turn HD video back on for free.