After receiving your e-signature certificate, you must create a PIN (password) code to start using it. This PIN code is mandatorily used to verify your identity and ensure security during your electronic signature transactions. You cannot use the electronic signature application without successfully creating and activating your PIN code.

For information and assistance on how to create your PIN/password code and how to resolve potential PIN lock (PUK) issues:

How can I generate the PIN (password) code of my e-signature SIM card? How can I unlock the PIN?