微信红包发给好友后24小时内好友没有领，就会失效。
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微信红包是腾讯旗下产品微信于2014年1月27日推出的一款应用，功能上可以实现发红包、查收发记录和提现。
2014年4月14日，“安卓手机用户只要用微信扫描身边出现的红色二维码，通过腾讯应用宝成功安装其他应用软件，即可领取微信红包。
微信红包与2015年春节联欢晚会的互动，让其成为了年夜饭的主菜单，小小的红包甚至不小心抢了春晚的风头。
微信发送红包的具体操作方法如下：
1.在手机页面中找到“微信”APP，并打开。
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2.在微信页面中“通讯录”一栏中选择所要发红包的对象。
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3.点击进入聊天页面后，点开对话栏右下方的“+”号。
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4.找到“红包”点击进入“发红包”页面。
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5.编辑单个红包金额后，任意输入“留言”，点击“塞钱进红包”。
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6.此时，需要你输入支付密码以及选择支付方式。
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7.然后在聊天栏中便可以看到自己所发的红包了，接下来就等待好友领取红包吧。
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