To change your UPI PIN in Paytm, follow these steps:
- Open the Paytm app and tap on your profile icon in the top left corner.
- Select UPI and Payment Settings, then tap on the bank account you wish to update.
- Select Change PIN and enter your existing UPI PIN.
- Enter your new 4 or 6-digit UPI PIN and confirm it.
If you forget your old PIN, select Forgot UPI PIN to reset it using your debit card details or Aadhaar.