This is the Nokia solution for 5250 Mic, mouthpiece microphone is not a problem. The solution repair guide below simply shows the paths connecting the microphone to solve problems.
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Just follow a few simple tips on how we the microphone problem on Nokia phones Nokia 5250 to solve.
Nokia 5250 mic microphone problem can be solve with a few steps that i
am going to write here if you are facing no mic voice is going forward
or low voice goes to destination then you can check mic replace mic with new one.
there are two main colors in this diagram red and blue as you can see easily so these two lines are defining main path of links check
these links and if any of them is broken then make these jumpers as
define in diagram attached with this post.if any component is damage you
can replace it also with same value parts.
for more detail and new tips and tricks about this problem keep
visiting this page we will update it timely with new diagrams.some
related post are also given bellow you can read them also for more