Hello! Sorry for not specifying, at the end it was an issue with my computer, not the headset. I reinstalled a bunch of audio related drivers and as soon as I restarted the issue was solved. Thank you for your help anyways, I appreciate it.
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Weeks ago, i used to be able to get on calls with my bluetooth headset (WH-1000XM4) with no problems, except, obvioulsy, hearing everything on low quality audio (which happens with bluetooth devices when the microphone is in use)
However...