It's possible to upgrade my device to an previous not recent version?

Have two devices:
iPad 4 (MD524B/A) iOS 8.1 (12B410)
iPhone 6+ MGAH2ZD/A iOS 8.1.2 (12B440)

Both are corporate property devices and we need to wait until the Company approve the iOS Versions before we can upgrade them.

The reason why they are not up to the last approved version was that I was pulled out to another Project and miss to upgrade them by time.

Now I would like to know is it possible to upgrade them to a previous than the actual version like 8.2 and how?.

Thanksin advance
iSenat