在京东购买东西后，如果码数不合适的时候，可以选择换货。
1、先打开京东手机客户端，打开之后单击右下角的“我的”按钮。
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2、然后进到个人中心面板，单击“我的订单”按钮。
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3、接下来就会进入到订单列表，找到要申请换货的商品，然后单击“申请售后”按钮。
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4、然后就进到售后页面，在申请数量里选择要换货的数量，再单击下方的“换货”按钮。
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5、就出现选择申请原因的界面，选择要换货的原因是什么。
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6、选择好之后，在问题描述里面再描述下换货的原因，然后点击“提交”按钮。
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7、在选择好取件方式并点击提交按钮，就会出现售后服务单申请成功界面，申请成功后等待商家处理，商家处理后就可以将商品退回。
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