求指点 怎么辨别iphone5是不是新机

想买一台iphong5,就是有人签线了但有不要手机的那种，但我怎么知道那手机的保修啥时候开始啥时候结束，怎么知道它是刚签的新机，求各位大侠指点，谢谢了！火眼金睛路过到时借你眼睛用下看价格！就知道〜
我觉得没有那个二货会拿二手机当牵线机来鱼目混珠！
具体的去电子产品板块去「取经」谢谢赐教！我是怕我运气不好，正好遇到鱼目混珠的:lolhttps://selfsolve.apple.com/agreementWarrantyDynamic.do
未开封未激活之前来这里检查保修状态，你会看到，显示请激活你的iPhone
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Please activate your iPhone
We are unable to display coverage details because your iPhone has not been activated.
Please contact your iPhone retailer or wireless carrier to activate your iPhone.
Find your wireless carrier and see your service options
Note: Warranty service does not depend on activating your iPhone. Please contact us for more information
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然后取出你的手机，开机联网激活（通过wifi或可上网的手机卡或连接电脑的iTunes即可激活），
激活后稍等一会，再次回到苹果官网查询，即可查到保修状态。https://selfsolve.apple.com/agreementWarrantyDynamic.do