Buying this phone is one of the best decision of my life. Great performance all around. 6 GB ram make this phone a beast. Close your eyes and go for it.16MP primary camera with high speed autofocus technology ( PDAF) , updated electronic ( EIS) and optical ( OIS) stabilization technologies protected and 16MP front facing camera13.97 centimeters ( 5.5-inch) Optic AMOLED capacitive touchscreen with 1920 x 1080 pixels resolution and 401 ppi pixel densityAndroid v6 Marshmallow operating system ( Upgradable to v7 Nougat) with 2.35GHz Qualcomm Snapdragon 821 MSM8996 Pro quad core processor, Adreno 530 GPU, 6GB RAM, 64GB internal memory expandable up to 128GB and dual SIM ( nano) dual-standby ( 4G+ 4G) 3400mAH lithium-polymer battery