PhonePe
PhonePe is a one stop UPI-based app which can serve all your payment needs, in a safe and secure manner. Through PhonePe you can link your bank account(s) over UPI and make instant bank to bank transfers by just using a mobile number or unique payment identity.
Make sure you open the app after installing.

Register in the app and complete a transaction in order to receive credit

If you uninstall mCent, you will NOT get credit