After some research it turns out that the S4 mini sold on amazon is not compatible with the 4G at Free amazon sell as a model "import europe" while I'm bought on Amazon.com After taking contact with samsung, they will not provide update to resolve the situation ... The only option you have left is to install a custom rom as cynogenmod. In summary I'm still quite disappointed on the one hand the lack of information and amazon samsung laziness provide an update.
