I am a locked iPhone 4 user with TurboSim. With the advent of the opportunity to get rid of her using the SAM method, I immediately successfully did everything I needed and began to use the phone without a Gevey card. Then, following the instructions, I saved the files to be able to restore my activation. Moreover, I manually saved the Lockdown folder using iFunBox.
However, when I decided to flash on iOS 5.1.1, I was unable to restore the saved Activation Ticket using the standard method. I had to go back to using TurboSim. And now, after a week of searching on sites and forums, I managed to achieve the desired result. Due to the lack of a complete instruction on the Internet, I decided to write it to help everyone who faced a similar problem.
In part, this instruction has some illogical moments (for example, the choice of a certain version of Redsn0w and custom firmware), which I could not explain, but following this particular instruction I was able to unlock my iPhone.
This instruction was successfully tested on iPhone 3GS and iPhone 4, restored to iOS 5.1.1, but can be applied to other firmware versions if there are saved SHSHs. In this case, you should select the firmware that matches your device.
So, to restore we need:
- locked to the operator iPhone.
- SIM-card for which the unlock was made and Activation Ticket saved.
- custom firmware 5.1.1 without modem upgrade or other firmware corresponding to your iPhone model. You can download it or make it yourself (instructions for 5.0.1, but it is identical for 5.1.1. In step 4, you need to select the official firmware 5.1.1).
Saved Lockdown folder (it contains the necessary Activation Ticket, located on the path / var / root / Library /)
Of course, the instruction is for those who managed to use SAM activation
Before starting the operation, you must insert a SIM card into your phone, for which Activation Ticket (Lockdown folder) is saved without Turbo-SIM.
- Check again if you have saved the lockdown folder from / var / root / Library / to your computer.
- We make a backup of the data you need, for this we use our instructions.
- Download custom firmware 5.1.1 WITHOUT activation (it does not raise the modem version and does not block the Push function, as does the firmware with activation). Don't worry, we will activate the phone later even without the original SIM-card of the operator on which the iPhone is locked.
- Download RedSn0w 0.9.10b8, despite the fact that there are already later versions of the program, this version implements the mechanism we need.
- Flashing your iPhone (instructions for installing custom firmware).
- After the installation is complete, the device will start up and require activation. Put your phone in DFU mode.
- Launch RedSn0w 0.9.10b8 and select Jailbreak (as you know, this version of RedSn0w performs tethered jailbreak).
- Next, do an ordinary tethered jailbreak according to the instructions.
- After the end of the process, the device is loaded again and awaits activation, as in step 6, but with a jailbreak, which means that we can access the iPhone file system from a PC.
Through the iFunBox application on the computer, go to the path / var / root / Library / and delete the "lockdown" folder.
- Instead, copy to the device the Lockdown folder saved on your PC with the activation data using the SAM method.
- Reboot the device - it is unlocked and sees your operator's network.
- All that remains is to go to Cydia and make a tethered jailbreak - untethered using the Rocky Racoon utility.
Also, you can try an alternative way to restore Activation Ticket using the Cookie application from Cydia, which we also tested to work. To restore the Activation Ticket saved in this application, just click on the Restore Activation button.