Noise suppresion phone calls

On the Librem 5 when I am making calls, people tell me that on my end all they hear is my voice. But where I am calling from has a ton of background noise. Cars, wind, people walking around, and so they should be hearing some of that as well. But they all say that it sounds like I am alone in a room with nothing else.

I wasn’t aware that the L5 did something like this. Is this something that has been around for a while now?

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In my case its the exact opposite happening. They can’t hear me most of the time

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Some caveats in my situation are that I am on Telekom here in Germany and that I used the bm818 tool to enable VoLTE. Maybe that has to do with it?