if you are facing nokia 100 mic problem. and want to solve it with jumpers. Nokia mic problem solution jumpers are given in this post. In this diagram you can see two different color lines.
Red color and blue color lines are given as tracks of mic ways. Check these path and apply jumpers if any of these links is missing.
After you have changed the mic and check these mic prints and ways mic problem will be solve easily.This diagram will help you to solve nokia 100 mic problem solution.