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•

 can also be entered in quotation marks (e.g. "1234").

• To check the number of remaining attempts to enter the passwords use the 

 command.

• See 

 for information on passwords.

• See 

 for information on lock types.

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 oper-

able. 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 

=PUK1,new PIN1.

• You can use the 

 command followed by the GSM code **05*PUK*newPIN*newPIN#;.

PIN2 / PUK2: 

PIN2 prevents unauthorized access to the features listed in 

. The handling of PIN2 varies with the pro-

vider. 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 effect on PIN1. PIN2

consists of 4 digits, PUK2 is an 8-digit code only.

To unblock a disabled PIN2 you have two options: 
• You can enter 

=PUK2,new PIN2.

• You can use the 

 command followed by the GSM code **052*PUK2*newPIN2*newPIN2#;.

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 

?), 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 man-

ufacturer 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 

=Master Phone Code

• You can use the 

 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 

 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 (see

table below). The timing should be considered by system integrators when designing an individual MMI. 

Number of failed attempts

Time to wait before next input is allowed

1st failed attempt 

No time to wait

2nd failed attempt 

4 seconds

3rd failed attempt 

3 * 256 seconds

4th failed attempt 

4 * 256 seconds

5th failed attempt 

5 * 256 seconds

6th failed attempt and so forth 

6 * 256 seconds and so forth