Did you guys know about this?
And this (its a bit clickbaity as this is not XM4 exclusive, but applies to all Bluetooth headphones):
It's a bummer for me... My plan was to use the XM4s for WFH purposes. ie, not have to swop between headphones for both PC and phone use and also not have to change headphones for music vs calls.
Now it looks like the 2 device connection feature is kinda nerfed because you're forced to use the lesser codec.
And the point of using it as a "headset" on Windows is also nerfed because, again, you're forced to use the lesser codec.