Downgrading your iPod Touch is a somewhat involved process, but it can be useful. For example, it can be used to downgrade a device to a iOS version that can be jailbroken. [ … ] '''Important: While it is very difficult to brick these devices doing a firmware downgrade, it is possible.''' [ … ] The effectiveness on this guide will vary. While most devices are easy to downgrade, some are difficult or impossible to downgrade.