At&t phone in uk.

Sorry, this is probably already posted somewhere but I'm having trouble getting a straight answer. I'm in uk and getting a note 4 on att, obviously it won't let me update as I'm not in US. It's currently on KitKat 4.4.4. Just wondering, with Odin, do i have to update it with every android version released gradually working my way up or can I jump say, straight to 5.1 then from there to marshmallow? Thanks.

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