What to do if pin or password authentication fails – Siemens MC35 User Manual
Page 98
AT Command Set
MC35_ATC_01_V03.02
Page 98 of 228
13.03.2002
4.31.1 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). To unblock the SIM card, the client needs to enter 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. In such a case, the card
needs to be replaced.
To unblock a disabled PIN1, use the AT+CPIN command and enter the PUK when
prompted by the response +CME ERROR: 12. Alternatively, you can use the ATD
command followed by the GSM code **05*PUK*newPIN*newPIN#.
PIN2 / PUK2: PIN2 prevents unauthorized access to the features listed in Chapter 4.32. The han-
dling of PIN2 varies with the provider. PIN2 may either be a specific code supplied
along with an associated PUK2, or a default code such as 0000. In either case, the
client is advised to replace it with an individual code. Incorrect input of PUK2 will per-
manently block the additional features subject to PIN2 authentification, but usually has
no affect on PIN1.
To unblock a disabled PIN2, use the AT+CPIN command and enter the PUK2 when
prompted by the response +CPIN: SIM PUK2 or after the equivalent error code: +CME
ERROR: 18 was returned. Alternatively, you can use the ATD command followed by
the GSM code **052*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 at-
tempts to enter the correct password, ME returns +CPIN: PH-SIM PUK, 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 pro-
vider. When needed, contact Siemens AG and request the Master Phone Code of the
specific module.
Please note that, in contrast to Siemens mobile phones, the GSM engines do not sup-
port the option of sending the Master Phone Code with ATD and a *#0003*
GSM code. Therefore, enter the Master Phone Code when prompted after input of
AT+CPIN. For instructions see the examples provided in Chapter 4.18.2).
As an alternative, you can use the AT+CPWD command and specify a new password
for
one (see examples in Chapters 4.18.2 and 4.34).
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 mobile phones, 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 (see table below). The timing should be considered by system in-
tegrators when designing an individual MMI.
Table 8: Timing algorithm of incorrect password input
Number of failed attempts
Time to wait before next input is allowed
1
st
failed attempt
No time to wait
2
nd
failed attempt
4 seconds
3
rd
failed attempt
3 * 256 seconds
4
th
failed attempt
4 * 256 seconds
5
th
failed attempt
5 * 256 seconds
6
th
failed attempt and so forth
6 * 256 seconds and so forth