Google's Android One project is off to a flying start, all three smartphones perform great and look similar with exactly the same hardware. Its more a choice of brand than anything else. The Karbonn Sparkle V has a slightly different design that the other two with flatter sides. It has a very dark blue back-cover which is easy to remove and doesn't creak. It performs well, runs stock Android and is upgradable to future versions of Android including Lollipop. For your first smartphone, this is a good option.
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