The reasons for this are US Security Threats
The Federal Communications Commission (FCC) has warned that it could ban the activities of three telecommunications companies in the United States controlled by the PRC authorities.
China Telecom Americas, China Unicom Americas, Pacific Networks Corp ComNet.
These are China Telecom Americas, China Unicom Americas, Pacific Networks Corp and their joint venture ComNet.
Ajit Pai, the head of the FCC, issued a statement according to which the reason for these actions are the concerns about the US telecommunication networks security. The statement also informed that these companies received work permits in the United States more than a decade ago but over the past time, the risks associated with the activities of the Chinese authorities have grown significantly.
The US Department of Justice recently called on the FCC to deny China Telecom the ability to operate in the United States.
A year ago, the FCC refused to license another US state-owned company in China, to the United States, China Mobile indicating that this would increase the risk of espionage against the United States government.