Vodacom tests HD voice

I would like to know how noise reduction works on the network side. I know phones have a second mic that is then used to cancel out background noise. Would be interested to know the tech used to do this on the network side. Seems interesting.
 
What's the use.
After. 15. years I. Still. Get. No. Signal. In. Centurion. Vodacom.
 
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