When I leave a message, it reminds me to ask me the contents because the message was inaudible. When I talk, I am asked in general after a few minutes to call from a fixed to hear me clearly. When I phone from outside, it asks me to call back later because we only hear the wind and not my voice. When there are too many obstacles between my phone and the headset (eg. Phone in my coat pocket, my hand in the pocket on the phone), Bluetooth connection crackles and sometimes cut.
I bought this product retaining the many positive reviews I've read here. I regret: this headset is unusable for me.
I do not know if these problems are linked to it; or if they are common to all Bluetooth headsets. I can not know, since it was my first bluetooth headset. But I know this will be my last.