Once you have that ID, the recharge is four steps on any UPI app. Open Google Pay, PhonePe, or Paytm, go to Pay to UPI ID or Send Money, type in the FASTag UPI ID, enter the amount and confirm with your PIN. And, it’s done. Balance shows up within seconds in most cases. No bank login required, no extra verification. This is the go-to method when you need a quick top-up on the move.
