if volume up and down key is not working well in nokia 2720 fold then you can solve this keys problem easily by following this diagram that is attached with this post.in diagram upper points of keys are ground that are in black color and the bottom lines are with some different colors and can be find with color lines that where we have to make these jumpers.so makes these jumpers by following the diagram.as it is defined in diagram with pink and green colors.
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