Untethered Jailbreak to iOS 5.1.1 for iPhone 3gs unlocked with baseband 06.15.00

This writing follows the previous post of untethered jailbreak for iOS 5.1.1 but not for the locked sim. There are some links disclosing the solutions for those with the locked sims which are not unlocked with the iPad baseband of 06.15.00. Our iPhone 3gs which was unlocked with the iPad baseband 06.15.00 cannot be completed with those solutions. We can jailbreak it to iOS 5.1.1 but we cannot unlock it to get the call in place as usual. We have tried different ways but we have not yet got the key application to unlock it until we have found the link below. We also downgraded it to the previous iOS which we have kept SHSH blobs(link is in my blog too!) before finding this link.

This link of untethered jailbreak to iOS 5.1.1 for iPhone3gs unlocked with iPad baseband 06.15.00, corrects our point completely. We can jailbreak to the latest iOS as well as unlock our phone.

Please read the process carefully in the link. I have focused parts of the whole process below.

The process is that we download the needed applications and choose the right choice as suggested in the link to custom the firmware to be used with iTunes. As mentioned in the link, Shift & Restore in iTunes to lead us to our custom firmware will jailbreak our iPhone 3gs.

After jailbreaking, we have to unlock it with ultrasn0w. However ultrasn0w needs the fixer, named ultrasn0w fixer for iOS 5.1.1 from the source of iParelhos.com, to be installed first. And then install ultrasn0w 1.2.5 from the source of DevTeam to our idevice.

Good luck to your turn.