"It's safe to assume we're talking to all of the major carriers, " said Jannie Luong Nguyen, a spokeswoman for Huawei's U.S. business.

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And they ask whether Huawei has supplied any equipment to the U.S. government or its contractors and whether Huawei employees have been granted security clearances.

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U.S., Huawei is planning an April 5 celebration marking 10 years of business stateside.

FORBES: Huawei Holding 10-Year U.S. Anniversary Event To Refine Reputation