The heads of the CIA, FBI, NSA, and other U.S. intelligence agencies have warned against Americans buying and using smartphones made by top Chinese electronics company Huawei, also expressing security concerns with fellow Chinese telecom company ZTE.

“We’re deeply concerned about the risks of allowing any company or entity that is beholden to foreign governments that don’t share our values to gain positions of power inside our telecommunications networks,” FBI Director Chris Wray told the Senate Intelligence Committee.

“That provides the capacity to exert pressure or control over our telecommunications infrastructure,” Wray said. “It provides the capacity to maliciously modify or steal information. And it provides the capacity to conduct undetected espionage.”

Huawei has been aggressively attempting to enter the U.S. telecom market, first through a partnership with AT&T that was eventually called off.

During their testimony to the Senate panel, U.S. intelligence chiefs praised American telecoms for resisting overtures from Chinese competitors.

“This is a challenge I think that is only going to increase, not lessen over time for us,” said Adm. Michael Rogers, the NSA’s director. “You need to look long and hard at companies like this.” [source]