Micromax spark 4G was the worst experience in smart phones, the battry always had back up problem and I got it replaced as it was under warranty but even the replaced battery was a recycled one, there was absolutely no proper after sales service I ended up paying twice as much for the phone, the picture quality is good though but there is always a problem with the volume the volume is so low that in spite of keeping it at the maximum it never works properly, I have decided that I will never go for this breand again