I used asus zenfone max for 8 months tgere ia no complaint till now and working super condition.i preferresld mainly this product for battery backup.once its fully charged battery will be back for 24 hours sure whether we using mobile data or using whats app.except some mostly draining apps.
Main thing is this mobile is fully customized compare with same cost mobiles.camera quality is awesome.sound quality also good. this is better mobile under 10000 rupees.