Only 220 MHz separate US 5G phones from radar altimeters—is airplane mode needed?
aakashgupta · x · 2026-11-12
aakashgupta lays out the spectrum facts behind the airplane-mode debate: US 5G phones operate at 3.7–3.98 GHz while radar altimeters use 4.2–4.4 GHz, leaving just a 220 MHz guard band. In Europe the phone band sits lower (3.4–3.8 GHz), giving a 400 MHz gap—which is why Europe worries less about 5G interference. He asks: should airplane mode be mandatory?
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