经尝试，5.0无法完美，只能升到5.0.1再越狱
@pod2g在年底给所有人送出了一份完美的越狱大礼：所有非A5 iOS设备升级到5.0.1均可以越狱。
设备包括iPhone3GS, iPhone4, iPhone4-CDMA, iPad1, iPod touch 3G, iPod touch 4G，并且同时放出了Mac和Windows版，以前用红雪不完美越狱的，可以直接覆盖越狱，以下是下载地址：
下载:
windows：redsn0w_win_0.9.10b1.zip（迅雷快传下载） Dbank下载iOS5.0.1越狱工具redsn0w 0.9.10b1
备用下载
http://musclenerd.com/redsn0w_win_0.9.10b1.zip
http://vdisk.weibo.com/s/1H2aV/1324985666
http://bbs.ptbus.com/thread-314104-1-1.html
redsn0w 0.9.10b1 for Windows (be sure to run in Administrator mode)
The untether is for iOS 5.0.1 on iPhone3GS, iPhone4, iPhone4-CDMA, iPad1, iPod touch 3G, iPod touch 4G
If you have one of those devices and are not on 5.0.1 yet, update now! The SHSH window is still open for 5.0.1 If you unlock via ultrasn0w or gevey, make sure you only get to 5.0.1 via a custom IPSW! See the guides at places like iClarified.com if you don’t know how. Once you’re at 5.0.1, use the latest redsn0w 0.9.10 to both jailbreak and untether.
If you’re already at 5.0.1 with a tethered jailbreak, you have two choices: either run redsn0w 0.9.10 over your current jailbreak (deselect “Install Cydia” if you do that), or install the Cydia package prepared by the chronic devteam. The patches are the same regardless of which you choose.
Some of you are using a hybrid 5.0/5.0.1 configuration. If so, do not attempt to install this untether over that setup! You will most likely get into a reboot cycle. Do a sync and fresh restore to 5.0.1 then install the jailbreak + untether.
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提示一：
完美越狱：
方法一：如果你之前已经用非完美越狱也可以在cydia内，让它更新或刷新一下，load完所有之后，完成后搜索Corona 5.0.1 Untether
安装完成
重启
完美破解
方法二：redsn0w直接覆盖破解一遍
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提示二：
Cydia秒退的解决方法 可以参考下~哈哈
方法一：
1.电脑需要安装itools（或者其他可以管理iPhone文件的软件）
2.复制/User/Librery/下的Keyboard文件夹到/var/root/Librery/
方法二：
1.因为需要修改系统文件，所以首先安装iFile。
2.复制/User/Librery/下的Keyboard文件夹到/var/root/Librery/
3.点/var/root/Librery/Keyboard文件夹右边的那个右箭头，所有权改为：所有者：root 组：wheel，并选择“应用到所有层级”
