Open Settings and select Phone > Phone management > Security > Security module.

Select Options > Open > Signing PIN.

A signing PIN is supplied with SIM cards that contain a security module. You need the signing PIN for digital signatures.

To change your signing PIN, select Options > Change and follow the instructions on the display. You may not be able to change the signing PIN for all security modules.

If you enter an incorrect signing PIN too many times, the code may be blocked. You need the PUK code to unlock the code. To open a blocked signing PIN, select Options > Unblock PIN. You may not be able to unblock all security module PINs. If you forget the PIN of a module, delete and reinstall the security module.

To save your settings, select Back.

Related topics

• Security module

• Security module codes