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Requirements
- SHSH blobs of the firmware you want to downgrade to.
- You have to save your SHSH blobs locally or in Cydia. Tutorial guide how to do that is here.
- If you are iPhone 4S user then you need to point RedSn0w at the 9A405 version of 5.0.1 (not to 9A406).
- Firmware files to which you want to downgrade to. You can use this link to download iOS 5.0.1 (9A405 for iPhone 4S)
- Firmware files of your iOS 5.1.1 (here is download links).
- RedSn0w 0.9.11b1 tool.
- iPhone 4S or iPad 2 or iPad 3.
- RedSn0w 0.9.11b1 tool.
- USB.
How to Downgrade iOS 5.1.1 on A5 Devices
Note: This method works only on iPhone 4S, iPad 2 and iPad 3. So if you use A4 device then go here for downgrade. Step 1. Open RedSn0w 0.9.11b1. (Run as Administrator if you are Windows user.)
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