Why are UPI apps not working?

UPI apps may not work due to several reasons: unstable internet connectivity, bank server downtime, or technical glitches at the NPCI level. Common user-end issues include entering an incorrect UPI PIN, exceeding daily transaction limits, or using an outdated app version. To resolve this, ensure a stable network, verify your bank balance, update the app to the latest version, or wait for server maintenance to conclude. If the problem persists, contact your bank's customer support.