The US has warned that if these countries use Huawei to build their 5G networks, they would need to reevaluate intelligence exchanges with other countries.
Senior US official Rob Strayer said such a role represents an "unacceptable risk" to security for the company.
It has been reported that the UK may engage the Chinese telecommunications company in the non-core parts of its 5G network.
But opponents of the plan have expressed concerns about Huawei's links with the Chinese government.
Last week, a breakthrough by the UK's National Security Council indicated that the government had decided to grant the Chinese telecom company a limited role in the introduction of 5G to the UK.
The news sparked controversy, with reports warning Prime Minister Theresa May's high-ranking Cabinet Ministers of the move.
The US has expressed grave concern at the time, along with Australia and New Zealand, who believe that the Chinese company poses a security risk because of its ties to the state.
In response to Mr. Strayer's intervention, Ms. May's official spokesperson said, "Our position has always been that the government will assess the risks and examine what action should be taken in the event of national security concerns regarding foreign investment. "
China's ambassador to London, Liu Xiaoming, said Britain should withstand pressure from other nations and that the company has "a good safety record".
"Commitment Can not Be Higher"
Mr. Strayer, Deputy Assistant Secretary for Cyber and International Communications at the State Department, said, "When countries put insecure and untrusted providers into their 5G networks, it does not matter Where We let countries know that we have to take into account the risk that comes with our understanding to exchange information with them.
"We will evaluate this risk. At this point, however, we can not make firm commitments as to how this will affect our information sharing relationship in the future. "
5G is the next and fifth generation of mobile Internet connectivity, which promises much faster data download and upload speeds, wider coverage, and more stable connections.
It promises download speeds 1
In an interview with the BBC, Mr. Strayer said, "We do not believe the stakes could be." As far as 5G technology is concerned, it's all superior because we've built all the things we've built in addition to this technology in the years to come
"This is really a monumental decision that is being made now … we believe there is an unacceptable risk of letting untrusted providers make this base infrastructure available because it could disrupt one of these critical services.
"In addition, we worry whether a government that has a track record in China may have access to the massive increase in data, in many cases, personal information that could be used in disgraceful ways."
What is Huawei?
Huawei was founded in 1987 by a former officer of the People's Liberation Army.
The company started manufacturing telephone network equipment and quickly became a world leader.
The company is headquartered in Shenzhen, Guangdong, and owns 180,000 of its 180,000 employees.
Smartphones and Huawei are also being manufactured lately The global market is now around 16% of the world markets, making it the third largest supplier in the world after Samsung and Apple.
The US points to the military background of its founder and possible interference by the Chinese government, which constitutes a national security risk.
Australia and New Zealand have prevented telecommunications companies from using Huawei devices in 5G networks, raising concerns about security.
However, the company wants to present itself as a company with no ties to the Chinese government. It states that safety and security take precedence and that at least some of the hostilities are due to the fact that the company poses a threat to competition.
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Earlier, Mr. Strayer told journalists that even an "unreliable" operator was put in the "margins" of the network, leading to risks of espionage or espionage. Part of the 5G network should have parts or software from a vendor could be under the control of an authoritarian government.
It is assumed that telecom operators who use Huawei devices in their networks were invited to a meeting with officials at the US Embassy in London on Tuesday.
Mr. Strayer travels to the talks to the UK.
What is 5G
5G is the next (fifth) generation of mobile Internet connectivity that promises significantly faster data download and upload speeds, broader coverage, and more robust connectivity.
The world is becoming mobile, and the existing frequency bands are becoming overloaded, resulting in failures, especially when many people in an area are simultaneously trying to access services.
5G is also much better for handling thousands of devices at the same time, from phones to device sensors, video cameras, to smart street lights.
Current 4G mobile networks offer speeds of about 45 Mbps (megabits per second) on average, and experts say 5G – introduced in the UK this year – could browse and download up to 20 times faster.
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