My note 3 n900 is off itself after open a game

My note 3 is power it self a after open Pokémon go game specifically when I open an pokemon
I try to play another game ant it close also after few minutes
I try to change the betray but the problem is continue
I try to put rom by odin and it is from Samobile the problem is still doing
The old rom is aroma rom from ur site
Plz I need help plzzzz
What is the problem and what is the solution !