Chinese spies often eavesdrop on President Donald Trump when he uses his unsecure cellphone to talk with old friends, and Beijing uses what it learns to try to sway U.S. policy, The New York Times reported on Wednesday, citing current and former U.S. officials.

Trump's aides have repeatedly warned him that his cellphone calls are not secure and that Russian spies routinely eavesdrop on the conversations, but they say the president still refuses to give up his cellular phones, the Times reported.

The officials said U.S. spy agencies had learned from people in foreign governments and by intercepting communications from foreign officials that China and Russia were listening to the president's calls.