Einleitung
Overuse of the texting/emailing feature can wear out the keypad and even damage it depending on the amount of pressure applied. This process is still considered moderately difficult, but with patience, can be completed with great results.
Remember that you are working with sensitive electronic pieces so don't rush through the steps and pay particular attention to step 4. To much pressure or going to fast can cause the small plastic clips to break off when removing the back casing, and that will prevent a tight seal when you reassemble the phone.
Werkzeuge
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Locate the indent in the case below the battery. (see red square)
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Place your finger at the indent and pull up on the battery to remove it.
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Locate the 4 screw holes and remove the 0.4 mm Phillips head screws using a #000 Phillips head screwdriver. (See red circles)
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Place the flat edge of a spudger under the edge of the press-fit connector and , gently pry the connector straight up from its socket. (Highlighted by the red square)
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To reassemble your device, follow these instructions in reverse order.