Side By Side Comparison of Karbonn A9 and Micromax Bolt D303. Compare Processor, display, RAM, Storage and other features here. You can quickly compare Karbonn A9 and Micromax Bolt D303 smartphones just by looking at their ratings and results showing "winner" and "runner up." There is also a short analysis comparing different features of Karbonn A9 and . You can also look at each hardware feature individually to perform your analysis while comparing mobile phones.