Paytm has introduced a new security measure of OTP login for your Account. Right now it has been Implemented only on PayTm's Website.. As you can still Login to your Paytm App as before. . ● Advice → You can loose the wallet balance in those accounts for which you don't have the Register Mobile Numbers with you.. So now Login to those paytm account on paytm app & Use your paytm balance as soon as possible !!