When I buy a smartphone at that time I know only paytm app to my online recharges. After some days freecharge is introduced at that time they gave 70 cash back on recharge of 10, so I made a recharge for trail purpose. After that I used to recharge from this site only. They will give cash back on our recharges. After some days I became regular for this site only. I'm using only this site, I left all other site. And also they are giving me one special coupon for every month with 50 cash back. And the cash backs are valid for 185 days. And the recharge is also very fast compared to paytm. If any failure in the recharge they will refund the money instantly. Only the drawback is this not valid for airtel users I don't know why, but I'm safe because I'm not using Airtel.