If the phone microphone cable is broken, weld it. The steps of welding are:
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1. First of all, you need to carefully remove the outer cover of the wire and gently burn the metal wire with a lighter.
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2. Then clean up the burning residue.
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3. Solder the wire, that is, apply a little solder on the wire.
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4. Continue the wire, weld the wire together, and pay attention to insulation treatment after welding.