Hi friends I purchase this product from flipcart and I am disappointing to purchase it .its sound quality is not good it have dolby atom bt it actual not working dolby sound.when some one call other site he can not hearig my voice it voice clear is not goood.The product battery is 4000 mah I can use it only two hours bcz it backup is only two hours.After using one hours this product it will so heated.Its features is good bt 3gb ram is there bt it is hang so many times.One things is very good is desingn and ots camera quality.i purchased it 10000 fromflipcart I things it is very high compare it performance.