BBC News
Bosses from the world's two biggest plane makers have called on the US government to delay the rollout of new 5G phone services.
In a letter, top executives at Boeing and Airbus warned that the technology could have "an enormous negative impact on the aviation industry."
Concerns have previously been raised that C-Band spectrum 5G wireless could interfere with aircraft electronics.
US telecoms giants AT&T and Verizon are due to deploy 5G services on 5 January.
