How to change your passcode lock?
Note: If the initial steps to set a passcode lock are incomplete, you will not be able to change your passcode lock.
To change your passcode lock
1. Open the Bigin app on your iPad.
2. Tap on Settings 
at the bottom right of the screen.
Under "Manage Privacy", you can find the title "Privacy & Security".
3. Tap on Privacy & Security > Passcode Lock.
4. Enter the current passcode.
5. Select "Change Passcode".
6. Enter your current passcode once more.
7. Follow the steps to change to a new passcode.
Info: Once you've set a new passcode, the next time you tap on the Bigin app icon to open the app, you'll need to use the new passcode to enter the app.