Telefonica appealed an earlier decision by the General Court that it must pay the fine to the European Court of Justice.

"In today's judgment, the Court dismisses Telefonica's appeal in its entirety," the ECJ said in a statement.

"The fine of 151,875,000 euros imposed by the Commission and upheld by the General Court therefore remains unchanged," it said.

(Reporting By Jan Strupczewski, editing by Robert-Jan Bartunek)