Nokia Bluetooth BH-905i headphones connected seamlessly with iOS 6.0.1 on iPhone 4 and iPad 3rd generation, but thereafter problems start.
In case of the iPhone 4, the Bluetooth connection works fine but it kills the WiFi, making it impossible to find any WiFi station and I have to resort to using 3G, the moment I stop the audio play on the iPhone, WiFi magically appears back!. On the iPad, it seems to kill the WiFi slowly 😁 .. so first it makes it to slow to use WiFi (YouTube only buffers when I pause the video), and the then the Bluetooth connection completely drops having no audio but still maintaining the connection. In both cases some this Bluetooth / WiFi interference is killing the pleasure of using Apple devices!
This only happened after upgrading to iOS6. I had excellent experience with Nokia BH-905i in iOS 5. Funny thing is the older Nokia Bluetooth BH-204 still works perfectly!
Judging from the above posts. I am not sure that buying a new Bluetooth headset is the solution with all those issues. Apple really needs to re-enable their older Bluetooth interface stack back and fix this by iOS 6.1 !
I tried all the reset, hard reset, unpair solutions, nothing works