Sony Xperia z1 be the good smart phone in sony mobile phones why because of it has dust proof and also water resistance. Its water resistance upto 30 meters depth of water and it will be in 30 mins. It has high resolution camera its has the 20.0 mega pixels camera and also front camera be the good to take selfies. It has cup charger no connect to charger and it is the 2 gb ram and 16 gb internal memory it happens longer battery it becomes two days while we dont have connect charger