Lenovo's colorful i807 {Engadget Mobile}

Nov 1st 2007 3:28AM i purchased lenovo i807 cell through medico student in china in may festivals, still to date it is working well, but recently the cell have some problem that is receiving ring well, after receiving the call my voice received others is good, but i am not receiving others voice, in loud speaker caller voice is good, audio MP3 is working well, headset is also working well, my prblem is only caller voice is not reach to me.. Please suggest. - edukondalu, Mangalagiri Post, Guntur Dt, AP India -522 503.