This process completely wipes your device. Back up important photos or files manually. Note that you cannot restore an iOS 9.3.5 iCloud/iTunes backup onto iOS 8.4.1.
If you prefer using a computer script that automates the process without manual file editing, you can use the community-developed tool called Legacy iOS Kit. This method requires a Mac or a Linux machine. downgrade ipad 2 ios 9.3.5 to 8.4.1
Locate the key. Change it from 9.3.5 to 7.1.2 . Save the changes and exit Filza. Step 3: Trigger the iOS 8.4.1 OTA Update This process completely wipes your device