C905 broken earphone. who can I me?

My C905 have broken earphone. My problem is: when someone call me or I call someone. Caller can hear my voice but when they said to me, I can't hear anything. I use Service tests for Earphone's test, it's doesn't working, so i must use speakerphone instead. Who can help me fix it?:(

meeeeee i had the same problem last week and fix 3 phones just like replace the top keypad will fix it 100% u can get them of ebay but if its still under warnty send it back

what was the production date of the phones with the problem you fixed?