Downgrading from iOS 6.1.3 to 5.1.1 on an iPad is generally not possible due to Apple signing only the latest firmware versions. Once Apple stops signing an older version, you can't install it through iTunes. If you had previously saved SHSH blobs for iOS 5.1.1, you might be able to use tools like Redsn0w or TinyUmbrella to attempt a downgrade, but this process can be complex and is not guaranteed to work.
Sadly, you cannot downgrade to an older iOS version after updating unless you disobey Apple's terms and use illegal hacks.
Sadly, you cannot downgrade an iOS device without installing illegal hacks.
Restoring a backup merely restores the apps, data, and contacts you had saved on the device. It won't downgrade it from iOS 8 to iOS 7.1.1.
You can't downgrade an IOS on your iPod Touch.
You can't downgrade IOS!
You cannot downgrade an iOS device without installing illegal hacks.
To downgrade iOS 10 to iOS 9, you could use related professional tools such as TunesKit iOS System Recovery, which supports downgrading any iOS versions. Besides, if you have any other ioS issues, this mighty software can help you to get out of trouble.
use your noodle!
You cannot downgrade an iOS device without installing illegal hacks.
iOS 4 is the name of the iPad operating system (iOS) and the version (4)
There is no way to downgrade from iOS 7 without disobeying the Terms.
ios 8 can be installed on ipad by first registering or have your device UDID registered by a developer and then download the iOS 8 beta and install it on your ipad