The US has warned the British government it "would be madness" to use Huawei technology in the UK's 5G network.
A US delegation presented the UK with new evidence claiming to show security risks posed by using the Chinese firm.
US President Donald Trump has sought to pressure Prime Minister Boris Johnson on the issue.
A decision is expected this month on whether to allow Huawei to supply some "non-core" parts for the UK network.
A US delegation led by deputy National Security Adviser Matt Pottinger met ministers in London on Monday.
he has "no reason to think" the UK's intelligence-sharing relationship with the US would be adversely affected if Britain used Huawei technology.
A Huawei spokesperson said: "We are a private company which has supplied 3G, 4G and broadband equipment to the UK's telecoms companies for 15 years. British experts are clear our technology does not pose a security risk."
Meanwhile, Conservative MP Bob Seely has said Huawei "to all intents and purposes is part of the Chinese state" and a deal with the tech giant would allow Beijing to access the UK's network.
He called on Parliament's Foreign Affairs Committee to open an immediate investigation into the company's suitability to build parts of the UK's 5G infrastructure.
A government spokesperson said: "The security and resilience of the UK's telecoms networks is of paramount importance."
"The government continues to consider its position on high risk vendors and a decision will be made in due course."