Step 1
Create a folder on the Desktop where you will download the 2 bootloader files required for Bootneuter from here: BL 3.9, BL 4.6, PwnageTool by here and firmware 3.1.2 for 2G of here .
This tutorial is only for Mac owners or for those who have installed Mac OSX on a virtual machine. For Windows there is no program that can do this yet, but keep your fingers crossed for sn0wbreeze. What does custom ipsw mean? Learn here.
It's best to download the firmware with Firefox because other download managers will unzip it, but if you've extracted using anything other than Firefox and the firmware has the zip extension instead of ipsw, then just change the extension from zip to ipsw.
Step 2
Mount the image with PwnageTool and open the application.
You will receive a warning message, press OK to continue.
Step 3
Select expert mode from the menu bar.
Step 4
Select the iPhone version for which you are doing the ipsw.
Step 5
Press continue and you will be asked to search the computer for the location where you downloaded the Apple firmware. Press the broswe button and go to the relevant directory. There is a possibility that the firmware will be found automatically if you copy the application to the folder where you downloaded the firmware.
Choose the firmware, then press continue.
Step 6
You will arrive in front of a menu with 6 options that give you the opportunity to customize the firmware in order to launch it. The General option will give you the opportunity to specify the size you want to allocate to the system partition (the one where applications will be installed, from Cydia, themes, etc.). Tick activate the phone and Enable baseband update, then click on the blue arrow.
You will be brought to the Bootneuter options menu. Tick Neuter bootloader, Unlock baseband and Auto-Delete Bootneuter. It is not absolutely necessary to upgrade to bootloader 4.6, but if you want to do so, you can also check this option.
The Cydia settings option will give you the opportunity to download applications from Cydia and insert them into the firmware to be installed automatically in the restore process. Click on the Download packages tab, double-click on the desired applications to download them, then select what you downloaded and press the blue button to continue.
You will be brought to a window where only the selected applications will appear, press the blue button to continue.
The menu will appear where Cydia and Icy will be displayed, if you want to install only one of them, it is enough to leave the desired application checked.
The Custom Logos Settings option will give you the opportunity to change the boot logos. Press browse to choose the images from your computer, but they must not be larger than 320×480.
Press the blue button to continue.
Step 7
You will reach the initial page of optuni. To start the process press the build button then the blue button to continue.
Step 8
If you do this for the first time then you will be asked to upload the downloaded bootloader files. First a window will appear asking you if you want to search for the files on the web, press No.
A 2nd window will appear asking you to indicate the location where you have saved the file with the 3.9 bootloader, select Yes and indicate the location where you have saved the .bin file then press Open.
The process is the same if you chose to upload to the 4.6 bootloader
Step 9
After you have indicated the location of the bootloader, you will be asked to choose the location where the custom ipsw will be saved, select it, click and click save to start the process. The process can take up to 10 minutes or more, depending on your computer.
You will be asked to enter your username and system password, which you must specify to continue the process.
You will receive a warning message in which you will be asked if the iPhone has ever been jailbroken. It is best to press No for an efficient restore.
Step 10
After PwnageTool finishes creating the custom ipsw, it will ask you to turn off the phone. WARNING! You must have your phone connected to your computer to continue the process.
Step 2
You need to enter the phone in DFU Mode. To do this you have a tutorial here or you can follow the instructions given by PwnageTool.
If the process fails, you will be greeted with a message similar to the one below, what you need to do now is to press Yes, remove the USB cable from the phone, close it, open it again, connect it again to USB and get ready to redo the process.
If you manage to enter the phone in DFU Mode, a message like this will appear:
If you have iTunes open, the following message will appear. If you haven't opened iTunes yet, you can do so.
Step 3
Simultaneously press Alt/Option to select the created custom ipsw and to start the restore process.
After finishing the installation, the phone will restart. The Bootneuter application will be automatically opened and the unlocking process will begin. The process should last at most 5 minutes, after which the phone will restart.
CONGRATULATIONS! You have a jailbroken phone, if you have other questions or problems you can ask me in the support page here.
