Actcully I am not so much tach savy, but just purchased lenova vibe k4 note and I am so happy to own this smartphone, i can say this is probably best smart phone in the rang of 12000, I got all my desired feathers which I always want in a smartphone, lenova’s sound quality is best ever in this range and it offer a good price value also, its matallic body show its quality and also vibe branding on back side looks rich in quality, about RAM is more than enough as I have no problem yet by its speed during playing games and all, its never hanged since I purchased lenova vibe k4 note, i highly recommended to all of u plz own once this phone it will never let u down, thnx