Patient is Macbook Pro 2019 16/256 1.4 (Big Sur 11.3)
When I pair my mouses (mx master 2s/mx master 3) my internet drops off at least 50% no matter its 2.4GHz or 5.0GHz. If I pair Bluetooth headphones too (edifier x3) my internet drops to 1Mb maybe or cuts off completely.
I went to an online support service and they told me to reset nvram etc but still doesn't work.
I found solution to rename the file bluetooth.plist and it was working for few hours.
I went again to service and they replaced the motherboard with a new one.
I found another solution just for few hours (
sudo defaults write /Library/Preferences/com.apple.airport.bt.plist bluetoothCoexMgmt Hybrid), and still nothing.
What can I do right now? I'm just sad, because I was saving a lot of money for my first Mac but my old laptop for 200$ doesn't have problem no matter what I pair on Bluetooth.