VIVO Y51L was my first phone and believe me till date there is not even one major problem which I faced while using this device. one of the main thing which I like in this device is its back. its back is soo attractive and looks very gud while kept somewhere. I am using this device from a long ago and because its having 2 gigabytes of ram with 16 gb internal storrage, I hav played heavy games like asphalt 8 not even 1 time I suffer from lacking issue. I am great fan of its battery life and it take very less time to be fully charged. no problem faced by me in this device