Paytm a nice site where you can recharge your phones, dth, do shopping at discounted prices. Although on recharges you get the benefit only when you are a first time user otherwise the offers are really helpful. But on shopping you can get amazing deals.
You can add money to your paytm wallet and get discount there too. On shopping you get cashbacks. There is cash on delivery option too. All in all it is a good option.