My brother sold me his iPhone 4, it was running on version 4.1 and was jailbroken.
After syncing it to my itunes I was unable to open any of the apps linked to his computer, and pretty much every app I tried to download from the appstore said I needed version #.##
I figured I needed to upgrade the software, and googled it.
I stumbled upon this and followed it:http://www.coolestguyplanettech.com/upgrade-jailbroken-iphone-to-ios-5-and-preserve-baseband-with-redsn0w/
Now I can't even do anything on my iPhone because it says it needs a sim that "came with your iphone"
Is all hope lost or is there anything I can do to actually have some use out of my iPhone?