Appendix A – Result Codes, Failure Causes, Other Tables
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 182
GSM Sequences List
In accordance with GSM Technical Specification 02.30, the product supports the following GSM sequences, which can
be used through the ATD and the +CKPD commands.

Security

**04*OLDPIN*NEWPIN*NEWPIN# Change PIN code
**042*OLDPIN2*NEWPIN2*NEWPIN2# Change PIN2 code
**05*PUK*NEWPIN*NEWPIN# Unlock PIN code
**052*PUK2*NEWPIN2*NEWPIN2# Unlock PIN2 code
*#06# Show the IMEI number

Call Forwarding

*SC# or
*SC**bs# Activate
or
**SC*PhoneNumber# or Register and activate
**SC*PhoneNumber*BS# or or
**SC*PhoneNumber*[BS]*T# or
*SC*PhoneNumber# or
*SC*PhoneNumber*BS# or
*SC*PhoneNumber*[BS]*T#
or
or
or
or
*#SC#
*#SC**BS# Check status
or
#SC#
#SC**BS# Deactivate
or
##SC#
##SC**BS# Unregistered and deactivate
or
The Service codes (SC) are:
002 all call for warding
004 all condition al call forwarding
21 call forwarding unconditional
61 call forwarding on no answer
62 call forwarding on not reachable
67 call busy
The Network service codes (BS) are:
No code All tele and bearer services
10 All teleservices
11 Telephony
12 All data teleservices
13 Fax services
16 Short Message Services
17 Voice Group Call Service
18 Voice Broadcast Service
19 All teleservices except SMS
20 All bearer services
21 All asynchronous services
22 All synchronous services
24 All data circuit synchronous
25 All data circuit asynchronous
26 All dedicated packet access
27 All dedicated PAD access
Note: The no reply condition timer (T) is only used for SC = 002, 004 or 61.