Side By Side Comparison of Karbonn A12 and Lava Iris Fuel F2. Compare Processor, display, RAM, Storage and other features here. You can quickly compare Karbonn A12 and Lava Iris Fuel F2 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 A12 and . You can also look at each hardware feature individually to perform your analysis while comparing mobile phones.