To change the PIN of your CiNKO wallet, you can follow these steps:
Open your CiNKO wallet
Click on the 'More' option on the bottom of the home page
Go to 'Profile Settings'
Select 'Security'
Click 'Change Your Pin'
Enter your current PIN
Enter your new PIN, then confirm your new PIN
Finally, press 'Save'
You're all set! You have your new PIN.