After insertion of the IC card while the UE is switched on, or when the UE is switched on while the IC card is inserted, or when the UE is switched on in the case of a plug-in SIM/USIM, an indication shall be given to the user that the PIN needs to be entered, unless the PIN is not applicable.
If the user wishes to perform a function protected by PIN2, an indication shall be given to the user that PIN2 needs to be entered.
When the user enters the PIN or PIN2, each entered digit should not be displayed to the user for longer than one second.
The following procedure permits the user to change the PIN or PIN2 in the SIM/USIM:
PIN:
**04*OLD_PIN*NEW_PIN*NEW_PIN#
PIN2:
**042*OLD-PIN2*NEW_PIN2*NEW_PIN2#
Note that the SEND function is not used in these procedures.
An indication is given to the user showing whether this procedure was successful.
The following procedure permits the user to unblock the PIN or PIN2:
PIN:
**05*PIN_UNBLOCKING_KEY*NEW_PIN*NEW_PIN#
PIN2:
**052*PIN2_UNBLOCKING_KEY*NEW_PIN2*NEW_PIN2#
Note that the SEND function is not used in these procedures.
The new PIN or PIN2 must be entered whether or not it is intended to change the PIN or PIN2. An indication is given to the user showing whether this procedure was successful.
An abbreviated dialling code shall be able to be read using the following procedure:
Alternative additional procedures are also permitted.
The SIM/USIM gives status information, as responses to instructions. Some of the possible return codes are deeply related to the user's actions and should therefore be indicated to her.
It is mandatory to give the user the appropriate indication (respectively) when the following codes appear:
description;
Memory Problem (eg. Update impossible);
Access conditions not fulfilled (eg. secret code verify rejected);
Unsuccessful CHV verification, no attempt left (eg. Secret code locked);
Technical problem with no diagnostic given. However, if this code is returned by the SIM/USIM in response to an ENVELOPE (SMS-PP DOWNLOAD) or ENVELOPE (CELL BROADCAST DOWNLOAD) or similar message, then no indication shall be given to the user, since in this case the code is not related to a user action.
The status information indication can be a dedicated lamp, text-string or others, as long as it is unambiguously made available to the user via the MMI.
As regards all other codes, it is left to the manufacturers' discretion whether and how the user shall be informed.