Hi thank you for answer 
my data.json was in the www root, so I put it in page folder too, in the page1 folder; everywhere in www product folder but anyway the same errror :s
It works when I put the code in the page1.js. But I want it for all project so I decided to make it Provider...since that cannot loas this f*** json.
There is no such Docs for Ionic 2 about Providers , I waste my time just trying to test a json import I think go back to Ionic 1 or other solutions....