Einleitung
If problems occur with the button keypad, this guide will show the user how to thoroughly clean them.
Werkzeuge
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Starting from the top of the cover, slide down and away from the phone with your thumb
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Lift battery cover off of batter and place it to the side
 
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Once battery cover is removed, place your thumb and index fingers on the the wires near the receptacle
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Gently pull straight up on the wires until a click is heard which signifies the battery is completely disconnected
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Place battery pack to the side
 
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Remove the two 11mm screws inside the battery storage compartment using Phillips #1 screwdriver (located near the very bottom of the phone)
 
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Gently open phone casing along the seam at the bottom of the phone using index and middle fingers of both hands
 
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Ensure that wired connection between circuit board and back shell is not strained
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Fold the back shell underneath the front shell and circuit board
 
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Carefully remove the middle two 7mm screws, the outer top 9mm screws, and the top middle 7 mm screw that hold the logic board to the front shell of the phone casing using the Phillips #1 screwdriver
 
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Using index finger and thumb, carefully remove the circuit board from the front shell of phone
 
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Remove the white plastic sheet covering the button pad with your fingers
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Gently remove the silicon button pad
 
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Wet one end of the cotton swab with water and clean button pad as needed
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Repeat process with multiple cotton swabs if needed
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Dry the button pad with a clean, soft rag before replacing
 
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To reassemble your device, follow these instructions in reverse order.