In March, the US government hit ZTE with some of the toughest-ever US export restrictions for the alleged breaches. It has since issued temporary reprieves on the curbs, which are now due to take effect some time after Feb. 27.

"The company has been actively cooperating and communicating with relevant US government departments in order to reach a conclusion of the investigation," ZTE said in a filing to the Shenzhen Stock Exchange.

"The outcome of the settlement issues still remains uncertain but will likely have a material impact on the financial conditions and operating results of the company."

Measures it has taken to placate Washington include a management overhaul and the appointment of a new chief export compliance officer based in the United States.

If no settlement or reprieve extension were reached before the deadline, US suppliers would be banned from doing business with ZTE, which could cut off much of the Chinese company's supply chain. ZTE relies on US suppliers for about one-third of its components.