How do I put unbranded Note 4 firmware on instead of 3 branded?

A

AC Question

how to put unbranded note 4 firmware on instead of 3 branded

basically i had a galaxy note 4 unbranded which was great , i then sold it and bought the iphone 6 (BAD MOVE).. cutting to the point i bought a second hand note 4 that is unlocked but 3 branded.. it seems a lot slower to do everything especially downloading apps and music etc.. can anyone tell me the simplest way of putting the basic note 4 unbranded firmware on instead.. i am on android5.0.1 model sm-n910f current baseband n910fxxu1boc3
please be as simple as possible not done this before
thanks
 

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