Samsung is one of leading brands that produces wide range of electronic appliances.Its Z2 product is a mobile with TIZEN OS not Android.Tizen is a special operating system which is developed by Samsung which doesn’t supports any android apps.The apps that supports these mobiles are in TPK format not APK.You have to download every single app from tizen store which is an inbuilt app itself.
Can’t say it is waste as it possess good cameras and it is useful for the persons who are willing to buy a branded mobile for good camera and to represent their status can buy this one as it is available at very low price.