Siemens TC37 Module At Command Reference page 100

AT Command Set
SIM locks: These are factory set locks, such as "PF", "PN", "PU", "PP", "PC". An 8-digit unlocking
code is required to operate the mobile with a different SIM card, or to lift the lock. The
code can only be obtained from the provider.
Failure to enter the password is subject to the same timing algorithm as the Master
Phone Code (see
Call barring: Supported modes are "AO", "OI", "OX", "AI", "IR", "AB", "AG", "AC". If the call barring
password is entered incorrectly three times, the client will need to contact the service
provider to obtain a new one.
Summary of related chapters:
TC3X_ATC_01_V04.00
).
Table 8
Related +CME errors are listed in Chapter 7.1.1. For further
instructions and examples see Chapters 4.18 (AT+CLCK
lock), 6.13 (AT^SLCK
password) and 6.36 (AT^SPWD
complete list of **# codes is provided in Chapter 7.4.
Page 100 of 204
Facility lock, 4.34 (AT+CPWD
Change password for a lock. A
Facility
Change
29.05.2002