Although modern aircraft are well-shielded to take into ... can also pose a potential interference with the plane’s radio ...

Once the aircraft door makes that familiar “thunk ... they’re very close to the signals used by the airplane’s radio altimeters, which bounce a radio signal off the ground and then ...

These frequencies are close to the ones used by radio altimeters on aeroplanes, which measure the height of the aircraft above the ground, and also provide data for safety and navigation systems.

In the US, the radio frequencies being used for 5G are ... that C-Band spectrum 5G wireless could interfere with aircraft altimeters, which measure a plane's height above the ground.