How to Downgrade Your iPad 2 or iPad 3 Using RedSn0w (Mac)

Source : Internet
These are instructions on how to downgrade the firmware of your iPad 2 or iPad 3 using RedSn0w for Mac. 

In order to continue you will need to have SHSH Blobs saved for the lower firmware version you are downgrading to. You may haved used RedSn0w or TinyUmbrella to save your SHSH blobs. Also make sure you have performed a backup of your device using iTunes.

iPad 2 owners can follow this procedure to downgrade to iOS 5.0.1 for jailbreak.


Step One
Create a folder called Pwnage on your desktop and download the following items into the folder.
- The latest version of RedSn0w
- The current iOS firmware (ie. iOS 5.1.1)
- The older firmware you want to downgrade to (ie. iOS 5.0.1 or iOS 5.1)

Double click the RedSn0w archive to extract it.


Step Two
Launch the RedSn0w application from the extracted RedSn0w folder.


Step Three
Select Extras from the main menu.


Step Four
Choose Even More from the extras menu.


Step Five
Select Restore from the even more menu.


Step Six
Click the IPSW button.


Step Seven
Navigate to the Pwnage folder on your desktop and choose the firmware ipsw you would like to restore to and click Open.


Step Eight
You will be informed that an additional IPSW is required. Make note of the ipsw file requested and click the OKbutton.


Step Nine
Select the additional ipsw specified in the previous step and click the Open button. (This will likely be the most current firmware ipsw).


Step Ten
You will now be informed that your device will be placed into recovery mode. Click the OK button.


Step Eleven
You must now select your blobs for restore. You can choose to specify local blobs or remote blobs.

REMOTE BLOBS
- Choose this option if you previously saved your blobs with RedSn0w and they were stored on the Cydia server. This is the easiest option if it's available to you.

LOCAL BLOBS
- Choose this option if you previously saved your blobs with TinyUmbrella or you used RedSn0w but did not let Cydia save a copy of your blobs.
- After clicking Local you will be prompted to select your saved blob file for the firmware you are downgrading to. If you used TinyUmbrella, simply press COMMAND+SHIFT+G, input ~/.shsh, and click Go to navigate to the folder with your saved SHSH blobs. Select the file that matches the ECID displayed in RedSn0w and the firmware version you are downgrading to, then click Open.


Step Twelve
RedSn0w will now stitch your blobs to the firmware ipsw and automatically begin a restore to the modified firmware.




Step Thirteen
You will be informed that your restore has been successful! If you were downgrading to jailbreak you can find jailbreak instructions here.

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How to Downgrade Your iPhone 3GS, 3G Baseband for Unlock (Mac)

Source : internet

This entry needs translation. To help us and submit a translation please click here These are instructions on how to downgrade your iPhone 3GS or iPhone 3G's baseband from the iPad's 06.15 baseband to 05.13.04 using RedSn0w for Mac. The Mac version of this tutorial can be found here. Typically you’d have the 06.15 baseband if you unlock with ultrasn0w but updated your iPhone baseband past 05.13.04. With this new capability, you can now downgrade specifically from 06.15 to 05.13.04 (even if you never had 05.13.04 on that device before). This gives you the best of both worlds: ultrasn0w unlock compatibility and a normal iPhone baseband with full GPS and the ability to use stock IPSWs again. Step One Create a new folder on your desktop called Pwnage. In the folder place the current firmware of your device (which can be downloaded from here) and the latest version of RedSn0w (from here). Extract the RedSn0w zip file by double clicking it. Step Two Launch the redsn0w application from the redsn0w folder we extracted earlier. Step Three Once RedSn0w opens click the Extras button. Step Four Choose Select IPSW from the Extras menu. Step Five Navigate to the Pwnage folder on your desktop, choose the firmware ipsw we downloaded earlier, and clickOpen. Click OK to confirm your selection. Tell RedSn0w whether you have a newer or older model iPhone 3GS. Step Six Press Back to get back to the main menu then click the Jailbreak button. Step Seven RedSn0w will now prepare the jailbreak data. Step Eight Check the Downgrade from iPad baseband checkbox, uncheck Cydia if you already have it installed, and clickNext to proceed through the normal DFU ramdisk steps. Step Nine Plug your iPhone into the computer and make sure its OFF then click the Next button Step Ten RedSn0w will now guide you through the steps to get into DFU mode. You can find more help with DFU modehere. Hold down both the Home button and the Power button for 10 seconds. Release the Power button and continue holding the Home button until RedSn0w detects the device. Step Eleven Your iPhone will now be exploited with limera1n and reboot Step Twelve Your iPhone will now be rebooted again and RedSn0w will begin uploading the new RAM Disk and Kernel. Step Thirteen RedSn0w will now inform you that its work is done. The rest of this process will take place on your device. Step Fourteen After showing some scrolling text, your iPhone will display the pwnapple icon and say Flashing Baseband. THIS STEP TAKES A VERY LONG TIME to complete and there won’t be any feedback while its running. Please just let it be for the next 3-8 minutes! When the ramdisk has done its job it will reboot the phone on its own. Step Fifteen Once the phone has rebooted you will be on the 05.13.04 baseband. You can then follow this tutorial to unlock!

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