Fault Details: When we make call there is no voice in speaker problem, Blackberry 9800 speaker not working.
Solution:- First confirm that speaker volume is full than disassemble mobile and check speaker with multimeter if speaker dead than change speaker only. If speaker gives continuity than this is motherboard fault check speaker points on motherboard and apply jumpers like diagram below.

Blackberry 9800 Speaker Not Working Solution on Flex solution

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