Gionee S6s is the best smartphone.It has good battery backup which lasts almost for a day if it is used heavily otherwise it lasts for more than one day I mean one and half.I am using this phone for a month and till now I have not faced any problems while using this.It has internal storage of 32 GB which good.Camera quality is also very good.You can take photos even in low light.It gives very smooth photo.Also it is available in new colours.I like the most about this phone is the fingerprint sensor.The sensor is of very high quality.Overall this phone is the best in this price range.You can buy this smartphone if you are looking for good and durable smartphone.