Why my Bluetooth 2012 handset is making a noise duration call?

Hi guys. As everyone is aware of Bluetooth device now a day and it is commonly used by different handset, mobile phone for call connectivity and other purposes. I have purchased new Bluetooth 2012 handset and every thing is working well like battery timing, sound quality but I am facing problem of noise suppression. By connecting again and full charging device result no effect. Please tell me what to do. Any suggestion.
