3. Why don't 2.4 ghz devices interfere and why can't you just connect them to your ...

Why don't 2.4 ghz devices interfere and why can't you just connect them to your phone?

You have to understand that Bluetooth, Internet, etc are protocols... rules that devices follow/languages they speak. If I want to make a wifi router, it has to meet the TCP/IP(internet protocol), and probably countless other protocols to become a functional wifi router. The same goes for your phone, mouse, headset, etc.

I can throw together a device that emits 2.4ghz, but for that 2.4ghz signal to be meaningful, there has to be a device that understands what it's saying, which is why we have protocols.

It's like human language. I can't just go to Germany and start living there because I don't know the language...I can scream as loud as I want and no one will understand me.

For your situation, realize that the mouse/headset manufacturers chose to write their own secret language used only by their devices.

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