I am using it from Dec 2015 and till now I have not faced any single problem. I have updated it to Android 6.0 successfully thru OTA. It’s camera is very good. Performance is also great. Doesn’t hang nor it gets slow. May be guys facing problems, you are not using it in the proper and efficient way. First learn to use a mid-range budget smartphone in the most optimum and efficient way. It’s not a freaking BMW! .very awesome mobile .user friendly product.long battery back up .just go for it.