1、找到手机界面的QQ，点击。
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2、在弹出的界面点击左上角的头像。
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3、在弹出的界面点击左下方的“设置”。
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4、在弹出的界面点击“账号、设备安全”。
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5、在弹出的界面点击“设备锁”。
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6、在弹出的界面点击“开启保护”。
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7、在弹出的界面输入手机号和短信验证码即可。
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