If problems arise after jailbreaking, you can just restore it through iTunes. Don’t worry about warranty issues. Moreover, it is said that jailbreaking is legal in the United States.

1. Back up SHSH after 5.0.1 jailbreak, so that you can restore 5.0.1 at any time. For specific downloads, you can go to Weifeng.com. There is an IOS firmware download under the homepage in the upper left corner. You can download it for any Apple device. IOS version

2. SHSH needs to be divided into 5.0.1, because Apple has closed the verification of 5.0.1, so if you want to restore it, you have to build your own verification server, otherwise a 3194 error will occur.

After jailbreaking, CYDIA will automatically back up SHSH for you. There are many related tutorials on Apple forums online

3. If the above cannot be achieved, flat flash recovery cannot be achieved

Hope it helps you Help