one
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Open the \"Settings\" and \"System\" of the phone, enter the system, and click \"About the phone\";
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two
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After entering, connect and click the version number 5 times, and then the page will pop up \"You are in developer mode\
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three
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Finally, return to the mobile phone page, pull the phone up and down, click to see more options, the page pops up USB connection, click reverse charging