Huawei's Mate 20X (5G) had been expected to be among the devices available on both company's superfast networks, but EE dropped the company from a launch line-up that includes Samsung's Galaxy S10 5G, and devices from Oppo, LG and OnePlus.
Vodafone UK took the same step, stopping pre-orders for the handset before the launch of its network.
PANASONIC CORP: The Japanese electronics giant said on May 23 it had stopped shipments of certain components to Huawei.
In terms of 5G home broadband, Vodafone will offer HTC's 5G Mobile Smart Hub and Huawei's 5G CPE Pro router.
US companies that supply the Chinese tech powerhouse with computer chips face a drop in sales, and Huawei's smartphone sales could get decimated with the anticipated loss of Google's popular software and services.
Global tech firms, including chip suppliers, are cutting ties with China's Huawei Technologies Co Ltd after the US government put the world's largest telecom equipment maker on a trade blacklist citing national security concerns. And in a potentially more consequential blow, United Kingdom chip designer Arm Holdings, an important supplier to Huawei, said it was "complying with the latest restrictions set forth by the USA government".
"We do believe it is important for the United Kingdom that we are in the pack of the leading nations (for 5G)", he said.
"We value our close relations with our partners, but recognise the pressure some of them are under, as a result of politically motivated decisions", Huawei said in a statement on Wednesday.
"We need to check whether our customers will be able to safely use Huawei smartphones amid concerns over Google's (future) moves", a SoftBank spokesman said.
The company, which makes a wide range of devices for smartphones, cars and factory automation equipment, declined to comment on which components are subject to the ban and where they are produced.
"[If we get that clarity] then we will un-pause the Huawei launch but if not we can't put a device out there".
United States officials this week, however, issued a 90-day stay on the ban, saying breathing space is needed to avoid huge disruption.
The issue has also been the source of heated controversy in Britain ever since a leak from the country's National Security Council (NSC) last month suggested the government was planning a limited role for Huawei in its 5G network.
Washington has long suspected deep links between Huawei and the Chinese military, and its moves against the company come amid the churning trade dispute between the world's top two economies.
Huawei founder Ren Zhengfei told Chinese financial magazine Caixin on Thursday that he did not see ARM's decision to suspend business with Huawei as having an impact on the company.
US Secretary of State Mike Pompeo warned Britain during a visit to London that it risked undermining the historic allies' intelligence sharing.