I using this phone for few years.In my opinion this is a very bad phone. Micro max is a famous company but this phone is very bad.After using this phone I have facing many problems.The main problems are can’t hear the ringtone, fully not supported HD videos, hanging problem and the internet speed is very slow it supported 3G.The phone has a bad battery life and it has a very bad quality camera.The micro max bolt d320 has a3.2 mp rear camera with led flash and the front camera is 0.3mp.it do not support some apps and the storage space is limited.This phone available 512mb of ram. This phone launched in April 2015 .The phone comes with a 4.50 inch to a display with resolution of 480 pixels by 854 pixels.many disadvantages for this phone these are, 1.limited amount of RAM(512mb) 2.low resolution screen and camera 3. internet speed is very slow. 4.heat and hang. Miramax bolt D320 price in Indian starts from Rs 2980.don’t buy this phone.