Samsung is the best smartphone company in the world. They will provide the smartphones with incredible feature and they also well know for their service. But samsung z2 is the worst smartphone of samsung because of its GuI and design. Samsung z2 iz run on Tizen os which one of the worst os which is really used. And very minimum users of Tizen so samsung store dosent contain the app you need.
Developers develop only the apps for android and ios tizen store has minimum number of app which are minimum in number. So I like samsung but because of Os I hate it and I suggest you to dont buy it.