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After flashing or factory reset of devie, sometimes it causes this problem on coolpad devices.
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SOMETIMES DEVICE VOLUME AND POWER KEY WILL ALSO STOP WORKING, FOR THIS PROBLEM ALSO THIS METHOD SHOULD WORK ON ANY COOLPAD DEVICES. IF PROBLEM CAUSED AFTER FACTORY RESET OR FLASHING OR ROOTING.
BUT DOT WORRY WE WILL HELP YOU TO SOLVE THIS PROBLEM IN 30 SECONDS WITHOUT ROOT OR PC.
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I MADE THIS VIDEO WITH MY COOLPAD NOTE 3 LITE
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