Tools
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            Remove the back cover and any installed SIM and memory cards. 
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            There are 8x black screws Torx T4. Remove them. 
 
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                  - 
            Remove the small black rubber at the lower left corner. 
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            Under it is the battery flex cable, disconnect it. 
 
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            Use a plastic tool to separate the middle frame. 
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            The battery is glued to the middle frame with an adhesive tape. 
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            Loudspeaker 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.