iOS modification became common in public now a days, everyone can now easily update or downgrade their iDevices just by sitting at their home or workplace. TinyUmbrella is a famous tool for jailbreakers which preserve SHSH blobs for firmware downgrading easily without asking Apple. The developer of TinyUmbrella has done a great job for introducing a new tool, dubbed asTinyCFW. This tool allow users to downgrade iPhone 4 and iPad 2 ( GSM Version ) from iOS 5 to iOS 4.3.3 Firmware for untethered jailbreak because apple has stop signing old firmwares.

Please note the following requirements before starting TinyCFW:

Now Follow our Step-to-step tutorial for using TinyCFW and for Downgrading your iOS 5.1/5.0 to iOS 4.3.3:

Step 1: Download TinyCFW for Windows/Mac ( Downloading links are given at the end of this post )

Step 2: Open TinyCFW by double clicking the .exe file for Windows or .jar file for Mac.

Step 3: After clicking, you will be faced by a small window ( shown above ) either you are on Windows or Mac.

Step 4: Click the “Choose Current IPSW” button at the top and navigate to the location where you have saved iOS 4.3.3 Firmware.

Step 5: The TinyCFW will show you the details of Current IPSW selected such as firmware version, baseband firmware version.

Step 6: Click “Save Target IPSW” button, Now TinyCFW will do a rest for you and in next minutes you will see a new firmware file with a extension .bbupdate.ipsw .

Your 60% work is done! Now open the Latest Version of TinyUmbrella and hit “Start TSS Server”button, minimize Tinyumbrella and open the latest version of iTunes. Select your created custom firmware in iTunes and now wait till the iTunes complete its process. Ensure to put your Device in DFU mode otherwise this process will not work. That’s all your Device is now downgraded to iOS 4.3.3.

Download Latest Version of Tinyumbrella for Windows or Download Tinyumbrella for Mac.

Download TinyCFW for Windows or Mac.

Download the latest version of iTunes dubbed as 10.5.2 by Clicking Here.