Asus zenfone is worst phone I ever come across. Its a mistake that I bought it. There features and the working process is very different.
Eg: . In the features it may written the battery is 2500 mah. But vivo battery of 2000 mah will be long lasting. It may say the RAM is 2GB or 4GB but in reality it always hang when we load a standard app, game etc.
Its looks and sound quality very cheap. Guesss every feature and hardware of asus company is just a fake one.