iH8sn0w, developer of popular jailbreaking tools such as Sn0wbreeze has just published a detailed guide on how to jailbreak iOS 4 for iPhone 3GS with new bootrom for Mac users.
Windows users can checkout this guide to jailbreak iOS 4 for iPhone 3GS (new bootrom) with SHSH blobs (ECID files).
Some important points before we proceed:
This guide is only for advanced users.
This guide is for Mac users, Windows users can checkout this guide.
Please note that jailbreaking your iPhone may void your warranty and hence proceed with caution.
Do not forget to backup your iPhone before you proceed. You can refer to this post for instructions on how to backup your iPhone 3GS. Continue reading »