U.S. Secretary of State Mike Pompeo has warned the EU against working with Chinese network firms Huawei and ZTE, accusing them of spying on users and stealing personal data.
Pompeo wrote a strongly-worded op-ed for Politico Europe this week, as ministers in Brussels gather for a communications meeting.
He said the Chinese IT giants have a track record of alleged espionage, theft of intellectual property as well as links to the Chinese military and intelligence services.
Pompeo urged European leaders to rely on other companies such as Samsung for their 5G infrastructure.
Despite Washington's campaign, Huawei is continuing to expand its range of products without key American-made components.
Industry sources say Huawei will increase its smartphone shipments to 300 million units in 2020, up 20 percent from this year.