Washington (CNN) President Donald Trump "tore into" UK Prime Minister Boris Johnson in a phone call last week after Britain announced it would allow Huawei into its 5G networks, according to a person familiar with the call.

The decision rejected longstanding US concerns about the Chinese tech giant. Trump was furious, according to the person, who said Trump berated Johnson over the move, which he characterized as a national security threat.

Officially, the US maintains a regretful tone about the decision, but the call reflects Trump's more voracious private anger.

"The United States is disappointed by the UK's decision," a senior administration official said when it was announced, adding the US would work with the UK "on a way forward that results in the exclusion of untrusted vendor components from 5G networks."

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