Sony. The name itself enough. No other advertisement is needed for this product. I had used many mobiles earlier but the sony mobile is at the height. The sony is user friendly when compared to others. The screen resolution and touch sensitivity is very nice. The sound and audio track is good. The storage space is enough. The camera both front and back is very clear and the cost is also effective. The charging system is nice and it also have the stamina mode which helps to long standing of battery.