Samsung galaxy s7 white android 60 marshmallow battery capacity 3000 mah 12 mp camera 4k video recording 51 quad hd touchscreen overview type sim free smartphone sim type nano sim network unlocked operating system android 6 marshmallow processor exynos 8890 octacore waterproof water dust resistant ip 68 colour black memory internal memory 32 gb memory card supported microsd up to 200 gb ram 4 gb con