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I have recently updated my Nexus from 4.3 to 4.4 . But having an immediate requirement i would like to downgrade back to 4.2 . I originally bought it with 4.2.

Any step by step to downgrade back are highly recommended. tried factory reset but of no luck. Is rooting mandatory for this? I have read some where that factory images are helpful. Please throw some light on this and a step by step document is needed being a layman on this?

marked as duplicate by bmdixon, Chahk, ale, eldarerathis Aug 6 '14 at 21:04

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this might helps. https://android.stackexchange.com/a/50728/39466

Pretty much details process from XDA forums http://forum.xda-developers.com/showthread.php?t=2010312

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