Table of Contents
Advertisement
What to do if PIN or password authentication fails?
PIN1 / PUK1:
After three failures to enter PIN 1, the SIM card is blocked (except for emergency calls). +CME
ERROR: 12 will prompt the client to unblock the SIM card by entering the associated PUK (= PIN
Unblocking Key / Personal Unblocking Key). After ten failed attempts to enter the PUK, the SIM card
will be invalidated and no longer operable (the device will respond with: +CME ERROR: 770, which
stands for: SIM invalid - network reject). In such a case, the card needs to be replaced. PIN1
consists of 4 to 8 digits, PUK1 is an 8-digit code only.
To unblock a disabled PIN1 you have two options:
• You can enter AT+CPIN=PUK1,new PIN1.
• You can use the ATD command followed by the GSM code **05*PUK*newPIN*newPIN#;.
Phone lock:
If the mobile was locked to a specific SIM card (= "PS" lock or phone lock), the PUK that came with
the SIM card cannot be used to remove the lock. After three failed attempts to enter the correct
password, ME returns +CPIN: PH-SIM PUK (= response to read command AT+CPIN?), i.e. it is now
waiting for the Master Phone Code. This is an 8-digit device code associated to the IMEI number of
the mobile which can only by obtained from the manufacturer or provider. When needed, contact
Siemens AG and request the Master Phone Code of the specific module.
There are two ways to enter the Master Phone code:
• You can enter AT+CPIN=Master Phone Code
• You can use the ATD command followed by the GSM code *#0003*Master Phone Code#;.
Usually, the Master Phone Code will be supplied by mail or e-mail. If the received number is
enclosed in the *# codes typically used for the ATD option, it is important to crop the preceding
*#0003* characters and the appended #.
Example: You may be given the string *#0003*12345678#. When prompted for the PH-SIM PUK
simply enter 12345678. If incorrectly input, the Master Phone Code is governed by a specific timing
algorithm: (n-1)*256 seconds. The timing should be considered by system integrators when
designing an individual MMI.
Refer to Section 9, Security Commands, for more information.
For more detailed information, refer to the Siemens TC65/MC75 AT Command Set document
available from Siemens.
001-0003-829 Revision 1
Page 33 of 65
Advertisement
Table of Contents
