Under your budget, the best and the most affordable one out of all is the Intex Aqua N7, which comes with a price tag of INR 3800. The phone comes with Android 4.4.2 Lollipop and a 1.2 GHz quad core processor. The front cam is 1.3 megapixel whereas the rear gets a 8 megapixel. The phone is dual sim and 3G enabled, making it the best value phone under your budget.