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Rebecca Hyowile from Recode. So lately I've been hearing a lot about 5G. It's going to get a

lot faster and better, but it's also causing some problems for airlines. What's going on here?

So starting on January 19th Verizon and AT&T plan to switch on new frequencies that phones

that are built for 5G will be able to connect to. So these connections, it's called the C band,

are supposed to extend the range of 5G connections, but also make them a lot faster. So it'll

really be the first time your 5G phone will actually feel like a 5G phone. Which actually sounds

really great, especially since wireless carriers have been saying for years that 5G is the future,

but I have a 5G phone and honestly works a lot like my 4G phone. So why are airlines upset about

this? So this all gets back to the FAA, the main agency that regulates flying in the United States.

For a while, the FAA has been concerned about really particular piece of hardware called

radio altimeter. Basically these are devices that beam down signals from aircraft,

like when they're landing for instance, and help aircraft measure how high they are above

the ground. So this is really important if you're landing somewhere where you can't see so well,

through its really mountainous, it's really cloudy. These altimeters are really important for a lot

of the safety hardware that's built into airplanes. The concern is that these altimeters rely on

airwaves that sort of neighbor the airwaves that are used by C band and the FAA is really concerned

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