Micromax Bult S300 is not a good mobile. My friend purchased it one year ago. It came with low price and huge features, but after using we found that, it have very less quality, many times we faced hang problem, also its battery back up is not good.
Its touch quality is also not of high. Its camera quality is not batter.
So I will not recomend you to buy this phone, many changes is required in this model to overcome limitations present in this phone to fullfill the needs of customers .
Thank You