I am using samsung z4 for 5 months . This phone facility is almost good . 1GB RAM, 8GB ROM & Camera quality is good . The unique operating system Tizen OS also available in this phone, but it is not widely recognised . Mobile phone battery are disappointing & finger print scanner are missing . The video call option is not there fb messenger . So please dont buy this mobile . Iam not recommend it for people who wants to buy it .