However, I encountered a small problem when Bluetooth equipment with my iPhone 4S iOS 5.1.1: indeed, no code request, ok sync. The problem: Once the headphones off, IMPOSSIBLE to reconnect without re equipment ... painful ... Enough! Solution found quickly, however, hence my 5 stars.
After contact with the customer service I received a solution in the day. In fact, he just follow the procedure on page 6 of the manual to reset the headset and everything works perfectly now! :)
Go for it!