Lyf. a heater in form of phone. I started using lyf wind 4s which was worth 7000 .I still regret of my decison of using it. Better I would have gone for mi aur other brands.I would suggest u all to not trust in this brand.save ur money and buy good and trusted samrtphone rather than buying a heater. while using internet it becomes so hot that I have to close my work and keep it for cooling.else it will blast.so buy a good one.not this one