You can deposit your bitcoins in Zebpay wallet and directly recharge your mobiles over there, or you can buy Freecharge.in vouchers too. I use that only to recharge my mobile phone.
Thats true.I also use Zebpay to recharge my mobile with bitcoin and it is very convenient but paytm/mobikwiq balance can be used for shopping as well besides mobile recharge which is currently not possible with Zebpay