Paytm is very good site. They have their very own app too. Best thing is that they gives free recharge when you buy the product on which paytm has their code redeem on their site. If yiu buy anything from paytm.com you will get coupons for free.
So lets think you recharge your mobile with some amount then you will get coupns of any meal or clothing or electronics. They will let you choose which coupn do you you want so this site is good for mobile recharge.