I have a Sony Ericsson T-610 and i had some difficulty pairing Anycom HS-777 with it. Initially i was not able to to recieve incoming calls thru it. Then i figured that i had to hold the button a little longer (the manual did not say this). Also the thing that loops around your ear is too big and gets very uncomfortable. I would suggest buy it only if your use is minimal.. you cannot wear it all the time.