you can see in diagram there are outer and inner keypad are define with different colors so that you can understand easily which keys of set are in the same track.
1,4,7,* is in same line
2,5,8,0 is in same line
3,6,9,# is in same line
up,down,menus,and dial key is same line
in the same ways all colors for outer and inner keys are showing keys track if any of them is missing we can make outer with outer and inner with inner jumper to all these which is missing to that button which is working good.
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