1. Dust or foreign matter may block the charging port.
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Suggestion: First of all, tear off the cotton swab, wrap it around the toothpick, dip a little anhydrous alcohol, carefully wipe the mobile phone charging port, after the completion of the wipe (you can also use a needle), you can see whether the mobile phone charging is back to normal.
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2. Cable aging.
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Suggestion: Try another root
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3. Mobile phone problems.
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Suggestion: Honestly take to repair it, if lazy to go, vivo official website is not a mail repair service.