How to fix “iPhone could not be restored. An unknown error occurred”
如何修复“ iPhone无法还原。出现未知错误”
Error message:
The iPhone could not be restored. An unknown error occurred
This error is a catch-all for a range of different problems. Depending on the underlying cause, there are a number of possible solutions:
Using the latest version of iTunes (and not a beta!) is a good place to start -- upgrade, if you're not already using the latest version.
Windows users can find a reboot helps to resolve this issue (if you follow the above and upgrade iTunes, you'll need to reboot anyway)
Completely resetting the phone and running a restore in DFU mode
Apple have a short document with further tips for this error
If these tips don’t work, find out how to fix a corrupt backup here .
错误信息：
iPhone无法还原。出现未知错误
对于一系列不同的问题，此错误是一个万能的。根据根本原因，有多种可能的解决方案：
使用最新版本的iTunes（而不是Beta版）是一个不错的起点-如果您尚未使用最新版本，请进行升级。
Windows用户可以发现重新启动有助于解决此问题（如果按照上述说明进行操作并升级iTunes，则无论如何都需要重新启动）
完全重置手机并以DFU模式运行还原
Apple有一份简短的文档，其中包含有关此错误的更多提示
如果这些技巧不起作用，请在此处了解如何修复损坏的备份 。