SAMSUNG Z2 IS BEST PHONE FOR 4G USERS, VERY HANDY TO USE IT , IT PROVIDE 1 GB RAM WHICH MAKE IS GOOD IN PERFORMANCE . AND MOST IMPORTANT THAT RELIANCE GIO SIM SUPPORT IT VERY FINE COMPARING TO OTHER VOLTE SUPPORT MOBILE PHONE MANY 4G PHONE HAS DIFFERENT TYPES OF ISSUTO RELATED TO NETWORK SUPPORT, SOME OF THEM NEED TO RESTART AFTER REGULAR INTERVAL SOME HAS NO CALLING PROPERLY, BUT IN THIS PHONE NO SUCH TYPE OF ISSUE FONDLED AT ALL, VERY GOOD FOR NET USERS ALSO AND LOTS OF FREELOADED APP MAKE IS SO SIMPLE ALSO WE CAN INSTALLATION MANY APP CORDING TO UR NEEDS . ITS LOOKING NICE IN ALL COLOR . SO IN MY OPINION IT IS GOOD VALUE PRODUCT