I want to tell you all that this smartphone is awesome and good for music lover, photo clicker and who want a hang free mobile. no any heating issue you will feel heat when you will use it connecting with charging and I want to say that using any mobile while you charging it is very dangerous and harmful so please avoid it.
asus zenfone 2 laser ZE550KL is middle in budget and best phone in this range.
sound is very clear
no any heating issue
superb camera both back nad front
very desirable in design
great battery life
finally asus is trusted company. so you can buy it freely for best and comfortable exprience.