Introduction
The speaker of a phone can go bad for a number of reasons. The most common reason for a faulty speaker is water damage. However, a speaker may go bad due to a faulty connection or faulty manufacturing.
Tools
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            Remove the black cover with the plastic opening tool. 
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            Remove the headphone jack from its slot. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.