How to test Lumia 930 microphones?

hello, i have the same problem exactly
1) how did you manage to replace the mic 3&4 on the board? are they need to be solder or you just stick them instead of the old ones?
how easy is that as they are not flex and attached to main board as your photo shows...
2)did you fixed the problem by now or left it as is?
thx
 

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