What does bluetooth not require support for multiple simultaneous devices. Have more than one device that won't let you connect more than one at a time.
I think it's a bandwidth issue. If I use bluetooth mouse, keyboard, and headphones at the same time, the mouse becomes very sluggish. It works totally fine if I turn off either the keyboard or the headphone.
I had no problem connecting a keyboard and phone (as modem) to a N800 back in the day, while also playing music from the phone to a pair of bluetooth headphones. But that was if i used PAN For the data connection between N800 and phone.
If i used DUN, either the music or the data would occasionally skip.
And that may well be what gives Bluetooth its reputation. So many choices for the various OEMs in terms of protocols/profiles, on top of a more complex air interface (channel hopping).
Given all of it, one may well be better off comparing Bluetooth to USB than wifi. As wifi is Ethernet over a single radio channel.
In theory, the Bluetooth protocol supports up to 7 devices connected simultaneously as slaves to one master device. However in practice, hardware support may be less than this.
