Paytm is a good online site/app from where we can recharge talk time, can do electricity payments, many other app paytm gateway for payment online. but I have noticed that during recharging of mobile talktime, it some times take to me time or sometimes transaction were also failed.
Another thing its offer were not good and it take some times 15 days to deliver products that was very bad. paytm have to concern about this matter.