iPhone Quick Jailbreak Question

[filmbuff]

I just got an iPhone 4 from Best Buy and it came with iOS 5.1.1. iOS 5 seems to run very well on it and I don't want to upgrade to iOS 6 because updates are pretty much what killed my iPad. What I'm wondering is, if I jailbreak the phone and then restore it later (to un-jailbreak) will iOS6 be installed automatically? It is already downloaded to iTunes and the little notification is telling me that it is ready to update so I'm afraid that as soon as I hit restore it will install itself.

Either way, how can I make sure that I backup my phone exactly as it is, so that I can go back to iOS 5 if I need to?

I understand why Apple wants to control what the user does but this is a little ridiculous. If I've already made the informed decision not to update, does there really need to be a red notification on my phone that won't go away? It's like they hate their customers sometimes.

 

[Applejuiced]

I just got an iPhone 4 from Best Buy and it came with iOS 5.1.1. iOS 5 seems to run very well on it and I don't want to upgrade to iOS 6 because updates are pretty much what killed my iPad. What I'm wondering is, if I jailbreak the phone and then restore it later (to un-jailbreak) will iOS6 be installed automatically? It is already downloaded to iTunes and the little notification is telling me that it is ready to update so I'm afraid that as soon as I hit restore it will install itself.

Either way, how can I make sure that I backup my phone exactly as it is, so that I can go back to iOS 5 if I need to?

I understand why Apple wants to control what the user does but this is a little ridiculous. If I've already made the informed decision not to update, does there really need to be a red notification on my phone that won't go away? It's like they hate their customers sometimes.

If you hit restore on itunes it will automatically update your phone to the latest version.
Use redsnow to fetch whatever 5.1.1 blobs you have on the device now and submit them to cydias server.
Then in the future you will be able to restore to custom 5.1.1 firmware with those stitched shsh blobs even when Apple put out ios 7.0 for example.
If you dont understand what Im saying research and learn what are shsh blobs and what they do and how.