Huawei founder Ren Zhengfei has remained obstinate towards US moves against his company, saying the United States "underestimates" its abilities.
Speaking to Chinese state media, Ren downplayed the impact of recent US curbs and said no-one could catch up to its 5G technology in the near future.
Last week the US added Huawei to a list of companies that American firms cannot trade with unless they have a licence.
The move marked an escalation in US efforts to block the Chinese company.
According to transcripts from state media, Ren said: "the current practice of US politicians underestimates our strength."
The US said it would issue the 90-day licence that "will allow operations to continue for existing Huawei mobile phone users and rural broadband networks," said US Secretary of Commerce Wilbur Ross.
The UK's National Cyber Security Centre has published advice for Huawei phone owners on its site.
It said the licence should mean that Huawei customers can "update their handsets as normal". It added that it was continuing to assess the situation and planned to provide advice in the future for users.