换货是拿不到运费险的，需要申请退货处理才可以拿到运费险。
如果运费险失效可以通过以下操作来激活运费险后，重新申请退货。
1、进入【我的淘宝】-【我的订单】，此时看到对应订单上的【运费险】，进入订单详情页，下拉点击查看【运费险】。
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2、点击【运费险】后看到如下图所示，直接点击【失效激活】。
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3、在权益页面，会显示可使用该权益的保单，点击【激活保单】，可以看到有一张是【用于失效的运费险】。
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4、直接点击【用于失效的运费险】，此时失效的运费险就可以被激活成功了。
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5、重新回到我的订单页面，找到刚刚被激活运费险的那款宝贝重新申请售后即可。
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