Iphone 4 Jailbreak Ios 4.2.1 And Iphone 4 Unlock Solution With No Specialized Knowledge
https://tyachiv-rda.gov.ua/user/v9kjgos171/
Failure to do so will result in the device resetting to an state. I could never tell if it was the device, the program, or the track. There is a tool that could be used in the Safari browser.