A hacker who broke into the network of T-Mobile USA and accessed personal information on hundreds of customers including a Secret Service agent has pleaded guilty to a felony hacking charge.

Nicholas Lee Jacobsen, a 21-year-old computer engineer who now who lives in Oregon, entered his plea Tuesday in U.S. District Court in Los Angeles. He faces up to five years in federal prison and a $250,000 fine when he is sentenced May 16.