And you think that backing up the hole 32GB of your phone system could be a help? The ISPW it self all alone is about 600MB. So taking into consideration that you've found a software that can do what you wanted which is backing you the hole iOS 32 image which of course will include the actual iOS in your phone by the time you are performing that backup to your computer, and after installing the new ISPW to your phone, how will you not want the old iOS that was included in the back up 32GB image that you saved on your computer not to be restore back to your phone??? I guess you do understand that the image back up you restore all your files the way it was before you upgrade your phone, and i guess what you don't catch up is that not only your files will be restore back into your phone from that 32GB image back up but also the old iOS 100% of everything everything just the way your phone was before you perform that 32gb backup. At the end i will ask you what have you done? And you will answer, "i just waisted some time 1step front, 1step back." yet i do understand your inquiry about the back up stuff you saing. This can be done with windows computers ghosting the system and yes it's true, it's very easy and very conveniant, but also u should remember that when you ghost the image of your computer on a cd, "windows xp", after 10 years of using windows 7 or 8 or 20 if you ever decide to run that cd and restore the ghosted image into the computer you will be back to windows xp. You just can't ghost an image of an operating system and hope to upgrade and then restore only your files to the new system that you've just upgraded. There is no logic in it. So i recommend you to use the methods that are out there to backup your settings contacts files of your phone, upgrade your phone and then restore back your backup. If it's the cydia apps that you are worried about to get lose in the process, then don't, because there are also ways to back them all up.
Sent from my iPhone using Tapatalk