AT&T Inc said on Wednesday customers of its unlimited mobile data plan would get Time Warner's HBO, home to hit shows such as "Game of Thrones", at no additional cost.

The No. 2 U.S. wireless carrier, which is buying Time Warner for $85.4 billion to gain control of channels such as HBO and CNN, said the new service would be rolled out from April 6.

AT&T's "Unlimited Plus" plan includes unlimited mobile data and a monthly credit for its video services such as DirecTV and DirecTV Now.

AT&T lowered the price of its unlimited mobile data plan in February by $10 to $90 per month in response to rivals rolling out unlimited data offers, driving a price war among the top four U.S. wireless carriers.