Downgrade / Revert an MC40NO device back to JellyBean

I have three MC40No devices running Kitkat (4.4.4).  For project research I need to flash the devices back to JellyBean.  I have attempted to use the OS Zips from the downloads, but that did not work. 


Is there a process for reverting/downgrading an MC40  device back to JellyBean?

Saqib Hussain
Did you managed to downgrade

Did you managed to downgrade it at the end? I am having same issue

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