支付宝怎么修改手机号

更改支付宝绑定的手机号的具体方法如下：
1、先在手机菜单中打开支付宝应用。
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2、打开手机支付宝应用后，直接点击支付宝右下角的“我的”分支。
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3、随后在“我的”界面内选择打开右上角的“设置”选项。
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4、在支付宝“设置”界面内选择“安全设置”选项。
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5、打开支付宝“安全设置”以后，在主界面内选择“手机号”选项。
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6、在支付宝“手机号”的主界面中选择”更换手机号“的选项。
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7、在”更换手机号“界面里直接输入想要更换的新手机号码，并点击”下一步“。
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8、在”更换手机号验证码“的界面中输入刚刚通过短信收到的四位验证码。
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9、在经过支付宝的安全监测以后，便成功更改了支付宝绑定的手机号。
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