The European Commission on Tuesday presented its plan to ensure the secure introduction of 5G telecoms networks, with suspicions hanging over Chinese giant Huawei.
The United States has accused the firm of posing a security risk to western networks, because of its alleged ties to Chinese intelligence.
But some European countries are in negotiations with Huawei to deploy its advanced technology to power the faster wireless networks of the future.
The Commission did not call on European countries to follow the example of the US, Australia or Japan in banning deals with the firm, but it will determine the extent of the risk and encourage EU members to share information.
Andrus Ansip, vice president of the commission in charge of the digital single market, said: "5G technology will transform our economy and society and open massive opportunities for people and businesses.
"But we cannot accept this happening without full security built in. It is therefore essential that 5G infrastructures in the EU are resilient and fully secure from technical or legal back doors."