Apple is pretty adamant that once a user opts to upgrade, they don’t want them to be able to roll-back the software on their device to a previous version of iOS. In a lot of circumstances, this wouldn’t be an issue, but there are a number of legitimate reasons for users wanting to downgrade to an older version, in this case, from iOS 6 to iOS 5.1.1.

Potential reasons for downgrading firmware could range from wanting the iPhone or iPod touch on a version of iOS that currently has an untethe...