Hii frinds I recenty used redmi 4 4gb ram and 64gb internal memory phone.it is better performance of total redmi series.its runnig on v6.0 mashamallo it very updated version.it have 2.5curved glass protection on phone.it is value of money phone.my frends all are used this phone they all are very happy to use this.the memory expanded to256 gb this is another good qyality off this.battery power is soo well