Airbus and Boeing have expressed concerns about potential interference with flight safety equipment used to measure altitude, prompting US authorities to request a delay in the rollout of 5G networks by telecom operators AT&T and Verizon. The rollout of the high-speed mobile broadband technology was initially scheduled for December 5 but was postponed to January 5. US Transportation Secretary Pete Buttigieg and the head of the Federal Aviation Administration, Steve Dickson, sent a letter to the telecom operators asking for an additional two-week delay. The officials assured that 5G service can begin as planned in January with certain exceptions around priority airports. Verizon and AT&T are currently reviewing the request. The conflict between 5G networks and aircraft equipment has also led French authorities to recommend the switching off of mobile phones with 5G on planes.