I have a samgsung z2 in 2017. beigining it is good mobile beacause it is 4g and jio sim card free on mobile but some mounth after it’s hanging start. it is very bad vedios and photo quality, only 5 mege pixel. sound quality is very bad. In this mobileandroid apps do not run.it provided own store it’s called ’tizen store’. In the tizen store don’t give best result in best apps. in tizen store best games is not available.its battery is not good. mobile screen is small than mobile body frame.