need help with my used note 3 sm-n900a


Hi. i have just purchased an note 3 from a person who used to live in the us. the phone is at&t branded but open for all sim cards.
i have a coupple of problems,

1. i cant get norwegian language on the phone but i can get it on the keyboard.
2. the phone says that android 4.4.2 is the up to date firmware.

this is the sm-n900a version at&t

anything i can do? my norwegian note 3 has android 5.0 on it and all.

please help med:)