What is the 6-digit and 4 digit UPI PIN?

The UPI PIN (Unified Payments Interface Personal Identification Number) is a confidential security code used to authorize transactions. While most banks permit customers to set a 4-digit UPI PIN, some banks may allow or require a 6-digit PIN. The length often depends on the specific bank's policies and security requirements. When setting up UPI, customers select the PIN length based on the options provided by their bank.