iPhone 3G 8mb, Faulty, Unlocked +

Apple iPhone 3G 8mb Unlocked and restored to factory settings. Bought August 2009. The fault is that sometimes when answering or making calls the person you are talking to is unable to hear you. Otherwise the phone is fully functioning. The phone is in fair condition, It has a small crack near the cable socket and light scratches to the case. Comes with box and instructions.