Hello. Okay so my best friend has an iPhone 3G, she currently has it jailbreaked with Cydia but she wants to 'un-jailbreak' it so that she can have the latest apple software on their, basically so her phone isn't jail broken anymore. I've read some steps over the Internet but thought I'd post on here. If anyone could help that would be amazing. I have a windows 7 laptop, with the current version of iTunes so please could I have an easy, step by step instruction on how to un-jailbreak her phone please? Thank you!