If you want to get your iPhone back to the original status after the jailbreak, you can do it through TinyUmbrella. Such a situation can arise if your jailbreak does not work.
You will need the SHSH because Apple will only allow the user to restore to the firmware they sign and this means that this feature is handy for the user. It is a software that has been written in Java because this language is familiar and it won`t cause any problem so it will be safe to be used without any issue. It is pretty easy to use language, and this is why the creator of the tool decided to take advantage of this language so that he made this easy to use tool.
You will see that this one will be working without any issue and it will always be the right choice for you because of that. This tool will also require the user to offer it administrator privileges.
Another thing that you should know when it comes to this tool is the fact that it will work on Cydia, which means that you can use it with ease. In case you deal with some errors, you have to know that this tool will manage to get through the mistakes and it will offer you the support you need so you will manage to deal with errors without any problem.
You can download and try TinyUmbrella. You will certainly like it a lot because of the easy to and simple interface which any user will understand, and there won`t be any issues in using this application.