My loving mobile ?? is lg nexus 5x. The back camera of nexus 5x is 12.5 but it behave like more. It keeps great screen resolution. This mobile is operate quickly. It has latest version of marshmallows. It has only 2 gb ram but we know that the ram of this memory is ver sufficient because it may not hanged. The battery backup is not more but its a average. The sound quality is very fine it supports many type of sounds ?? thanks to you