Nokia lumia 520 (Rs 7,800): This Windows 8 phone from Nokia comes dirt cheap for the features it offers. This made it the world’s largest selling Windows 8 smartphone. The 4-inch screen is impressive, and the handset is powered by a 1 GHz dual-core Snapdragon S4 processor and 512MB of RAM. A host of color options make it stand out from the crowd. The 5-megapixel camera has impressive features.