Then all you have to do is run the easy downgrader!
最后你只需运行简易降级程序。
This matters for the downgrader as well as the downgraded.
这对降级实施者和被降级者都至关重要。
Try to reinstall all IOS's from original sources then run IOS Downgrader or dont downgrade at all, its not necessary anyway...
试试用官方版本安装所有的IOS，然后运行IOS降级程序(或者干脆根本不降级，因为它不是必须的…)。
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