At the Lumia 950 and Lumia 950XL launch event in India, Microsoft announced integration of Paytm with Cortana. With this integration, you can pay your phone bills directly using Paytm using Cortana. Cortana will now track your phone bills and it will display your due date. If you want, you can just tap it and pay your bill using Paytm. We will have more info on it soon.