Introduction
Replace your phone's Micro-USB flex cable to fix any charging issues.
Tools
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            Pull and twist the pin near the bottom left-side of the phone to remove it from the headphone jack. 
 
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            Insert the pin into the SIM card opening located on the right-side of the phone. 
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            Gently push in until the SIM card clicks, and then pull the pin and SIM card out. 
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            Repeat this process for the additional SIM card. 
 
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            Rotate the phone 180 degrees so that the bottom of the phone is now facing up. 
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            Firmly push up on the back panel with your thumbs. 
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            Lift up the back panel from the top right corner and gently pull it away from the phone. 
 
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            Remove the following screws securing the logic board to the main frame: 
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            Five 2mm Phillips #000 screws 
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            Two 2.5mm Phillips #000 screws 
 
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            Push down the yellow plastic lining at the top of the battery and remove the two 2.5mm Phillips #000 screws. 
 
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            Use the flat end of a spudger to gently snap open the first clip located on the the right arm of the retaining plate. 
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            Use the flat end of a spudger to gently snap the second clip located on the left arm of the retaining plate. 
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            Use the flat end of a spudger to gently lift the upper retaining plate from the phone. 
 
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            Use the pointy end of a spudger to gently pry the following connectors out of their sockets: 
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            silver LCD cable connector 
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            silver Headphone jack cable connector 
 
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            Use the pointy end of a spudger to gently pry the following connectors out of their sockets. 
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            Sliver Micro-USB cable connector 
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            Copper battery cable connector 
 
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            Remove the two 2mm Phillips #000 screws securing the copper flex cable to the silver metal tab. 
 
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            Wedge the flat end of a spudger underneath the bottom left of the metal tab. 
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            Run the spudger along the bottom edge of the metal tab and gently pry upward. 
 
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To reassemble your device, follow these instructions in reverse order.