Paytm is very good application ever , I use this application since 2011 and I am happy with the service of paytm but some time I am very disappointed but I can manage because every thing have a good fector and bad fector so try it , its awsome but dont forget to check before recharge any phone number.
I am going to explain what is the bad fector: - if you have a vodafone number and due to some reason you ported with airtel so in this case it take vodafone automatically and you know that you have now airtel sim because you already ported with airtel .