Smartprix - You can find phones & tablets according to your price range (there is a price bar which you can set accordingly). You can also add additional filters. You can compare phones but at a time four phones & also add more phones in a queue if you want them to compare later. The comparison which give a ranking to the phones according to its features differences. You can also add & see user reviews & ratings. Some expert reviews are also available on most popular phones. It also gives you different price options offered by different popular online stores.
PriceDealsIndia - Best site for comparing prices online in all online stores. It also compares phones (three at a time) & gives out a easy comparison result in terms of their respective features. It also gives you various options for discounts. There are also some coupons which you can get from this site for respective online shopping websites in which you can get pretty good discount with the coupons. You can also look for camera, laptops, external memories, audio players, gaming devices etc., here.http://www.pricedealsindia.com/
PriceBag - This site provides you information for different prices available online on major online shopping portals. You can also compare mobiles. Not only mobiles this site is also a search engine for computers, MP3 players, TVs & many more home appliances.
http://www.pricebag.com/
Flipkart - This of course you must have heard about it. This is a very famous online shopping store & has been a household name since few years for its quick delivery, quality service & above all cheap prices. This is also a good site to compare & find mobiles & many other gadgets. You can get a correct estimate of most reasonable price of the product here. It also has a wide array of reviews & suggestions by its customers which are indeed very helpful. You can also look for related accesories for your product & even screen guards & what not.http://www.flipkart.com/
iGyaan - This is the best Indian site for reviews & knowing about a device. This website provides you not only about mobiles but also about tablets, computers & its peripherals, camera & camcorders & also about vechicles in form of videos & articles. This site is basically for reviews & comparing phones. iGyaan also has a channel on YouTube in which you can find reviews & unboxing videos of almost every phone. So if you're buying a phone, first watch a unboxing video from iGyaan, you'll know what's in the device & what not.http://www.igyaan.in/
GSMArena - A great site for finding & comparing phones. But this site can give about the branded & known phones. Many brands are missing in its directory. But this gives the most accurate information about the phone's features & all. This site is also well-known for giving expert reviews on the devices. But this site is less useful in India. And in fact you'll get the prices of the phones in Euros or Dollars. Basically you can get news & updates about technology worldwide.http://www.gsmarena.com/
PhoneArena - This is also a good site for finding & comparing phones. There are zillion filter options you can get for finding phones. You can even get searching options by phone's design, built, service carrier & what not. But this site is for a global use so it shows phones from all over the world. There maybe many phones in the search result which might not be launched in several countries.
http://www.phonearena.com/
