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C-Band 5G Launches Delayed until Next Year

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Nov 4, 2021, 11:25 AM by Rich Brome

AT&T and Verizon have agreed to an FAA request to delay the launch of 5G in new C-Band radio frequencies by one month, while potential interference issues are addressed, reports the Wall Street Journal. Both companies were planning to launch the highly-anticipated mid-band 5G service on or around December 5th, but will now launch the service no sooner than January 5th, 2022. The FAA, which regulates aircraft, is concerned that C-Band frequencies are too close to the frequencies used by some RADAR altimeters, instruments that measure the distance between aircraft and the ground. The FCC — which regulates communications including radio airwaves — disputes the FAA's claim that the new 5G networks could cause this type of interference. The new 5G networks will operate at up to 3.98 GHz, while the altimeters operate at 4.2 – 4.4 GHz. Radio equipment operating at different frequencies can sometimes still interfere if the frequencies are close enough and inadequate filters are used. The new C-Band 5G networks are highly anticipated because this band enables 5G networks with a good balance of coverage and faster data speeds. Phones that support 5G NR in band 77 will support the new C-Band 5G networks in the US.

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