How to change UOB ATM PIN
It is recommended to change your UOB PIN number/password immediately upon receipt of the mailer. However, it is not very clear how exactly to change your UOB Debit Card PIN number.
The answer is that it is not possible to change the UOB PIN number online. (I called the UOB customer service at 1800 222 2121 to find this out.) Changing the UOB PIN Number is only possible at a UOB ATM machine.
How to change UOB Phone Banking PIN
Same as above, UOB Phone Banking PIN cannot be changed online. It can be changed at any UOB ATM machine.
The Phone Banking “Username”, or “Access Code” as it is called, is your NRIC number (numerical digits only, without “S” or the final letter).
Mathtuition88 