The US Federal Aviation Administration has published a list of 50 airports in the United States that will include buffer zones.
Wireless carriers will switch to 5G technology on January 19, 2022.
The two companies issued an agreement to postpone the implementation for two weeks to avoid a crisis related to aviation safety.
The list includes airports: New York City, Los Angeles, Chicago, Las Vegas, Minneapolis, Detroit, Dallas, Philadelphia, Seattle and Miami.
The two companies declined to comment.
According to Reuters, the two companies acquired almost the entire "C" band for 5G technology, during an auction last year, for $ 80 billion.
The Federal Aviation Administration has renewed its warnings that fifth generation services may remain causing interference during flights.
Even with temporary buffer zones around 50 airports, the deployment of 5G technology will increase the risk of disruption during times of low visibility, including "canceling, diverting, or delaying flights during times of low visibility," the FAA said.