selling phone and want to go stock

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http://forum.xda-developers.com – hello i recently bought note 2 and want to install stock ics on note 1 which is safest way to do this i am currently on lrq stock rooted with a few mods i want to put it back to ics stock no root ,do i have to go back to gingerbread first or can i install stock ics plz give instructions as i dont want to mess up thx (HowTos)