Donald Trump, who will be president of the United States in 14 days, answers calls on his cellphone, even when there is no caller identification information available, according to a Republican senator who is in frequent communication with him.

On Sunday, Senate Foreign Relations Committee Chairman Bob Corker (R-Tenn.) needed to talk to Trump, he told reporters Friday at a breakfast hosted by The Christian Science Monitor. “I called him on his cellphone, he answered it, we talked,” Corker said. “And by the way, my phone says, ‘No caller ID,’ so I’m not saying that has anything to do with me. Nobody has any idea who’s calling when I’m calling.”

The Trump transition team did not immediately respond to a request for comment about whether the president-elect screens incoming calls.