https://www.reuters.com/article/us-usa-trump-5g/trump-security-team-sees-building-u-s-5g-network-as-option-idUSKBN1FH103 >President Donald Trump's national security team is looking at options to counter the threat of China spying on U.S. phone calls that include the government building a super-fast 5G wireless network, a senior administration official said on Sunday.