This video explains how to change passcode for BHIM app.
If you forgot the login code of BHIM app, you can set it again.
On login screen, tap Forgot Passcode? Option.
You will be asked to send SMS again. Please keep your account number handy for resetting your passcode.
Tap on Proceed.
App need to send SMS from your phone to verify if your phone number is registered with your bank account.
For that, select registered number and tap on Next button.
App verifies the mobile number.
On Forgot Passcode section, enter your full bank account number and proceed.
Register the new passcode and confirm it.
Passcode is set successfully.
This video explained how to change passcode for BHIM app.