Pai's departure will come the same day President-elect Joe Biden is sworn into office.
The announcement came as Republicans expressed anger over Twitter's decision to bar sharing a New York Post story critical of Democratic presidential candidate Joe Biden's son.
The US telecommunications regulator voted in November 5-0 to issue the declaration and proposed requiring rural carriers to remove and replace equipment from the two Chinese companies from existing US networks.
Ultimately, Wi-Fi 6 and 5G will complement each other nicely and form a powerful 1-2 punch of licensed and unlicensed innovation, he told the virtual audience.
Pai said despite the good news, millions of Indians and Americans still live in rural areas where there is currently no case for the private sector alone to build broadband networks
Pai is facing backlash for his proposal which seeks to reverse Obama-era net neutrality, which meant that all websites are treated equally by Internet providers.
US President Donald Trump has nominated Indian-American Ajit Pai to serve another term at the powerful Federal Communications Commission.