Sinogold (China) Ltd.

GSM Command Strings
When various network functions are selected via the cellphone's menu using the keypad, the cellphone automatically generates the corresponding GSM network command string and transmits it to the network. 
These commands can however be manually entered via the keypad.

Each command is prefixed with either one or two * or # characters as follows:

** register and activate
* activate
## de-register (and deactivate)
# deactivate
*# check status

Once each command has been entered, if it is a network command (as opposite to a local handset command) it must be transmitted to the network by pressing the YES (receiver) key which acts as an enter key - this is represented here with the © character. 
Always enter numbers in full international format +CountryAreaNumber (e.g. +852 12345678).

Command Description

 Command String

Security
Change call barring code **03*OldCode*NewCode*NewCode#©
Change call barring code **03*330*OldCode*NewCode*NewCode#©
Change PIN code **04*OldPIN*NewPIN*NewPIN#©
Change PIN2 code **042*OldPIN2*NewPIN2*NewPIN2#©
Unlock PIN code (when PIN is entered wrong 3 times) **05*PUK*NewPIN*NewPIN#©
Unlock PIN2 code (when PIN2 is entered wrong 3 times) **052*PUK2*NewPIN2*NewPIN2#©
Display IMEI *#06#
Forwarding call  (Diversions)
De-register all call diversions ##002#©
Set all configured call diversions to number and activate **004*number#©
De-register all configured call diversions (no answer, not reachable, busy) ##004#©
Unconditionally divert all calls to number and activate **21*number#©
Activate unconditionally divert all calls *21#©
De-register unconditionally divert all calls ##21#©
Deactivate unconditionally divert all calls #21#©
Check status of unconditionally divert all calls *#21#©
Divert on no answer to number and activate **61*number#©
Activate divert on no answer *61#©
De-register divert on no answer ##61#©
Deactivate divert on no answer #61#©
Check status of divert on no answer *#61#©
Divert on not reachable to number and activate **62*number#©
Activate divert on not reachable *62#©
De-register divert on not reachable ##62#©
Deactivate divert on not reachable #62#©
Check status of divert on not reachable *#62#©
Divert on busy to number and activate /td> **67*number#©<
Activate divert on busy *67#©
De-register divert on busy ##67#©
Deactivate divert on busy #67#©
Check status of divert on busy *#67#©
Change number of seconds of ringing for the given service before diverting a call (such as on no answer). Seconds must be a value from 5 to 30. De-registering the same divert will also delete this change! **service*number**seconds#© (Service numbers, see below)
Barring call
Activate barr all outgoing calls (see Security to set code) **33*code#©
Deactivate barr all outgoing calls #33*code#©
Check status of barr all outgoing calls *#33#©
Activate barr all calls **330*code#©
Deactivate barr all calls #330*code#©
Check status of barr all calls /td> *#330*code#©<
Activate barr all outgoing international calls **331*code#©
Deactivate barr all outgoing international calls #331*code#©
Check status of barr all outgoing international calls *#331#©
Activate barr all outgoing international calls except to home country **332*code#©
Deactivate barr all outgoing international calls except to home country #332*code#©
Check status of barr all outgoing international calls except to home country *#332#©
Activate barr all outgoing calls **333*code#©
Deactivate barr all outgoing calls #333*code#©
Check status of barr all outgoing calls *#333#©
Activate barr all incoming calls **35*code#©
Deactivate barr all incoming calls #35*code#©
Check status of barr all incoming calls *#35#©
Activate barr all incoming calls when roaming **351*code#©
Deactivate barr all incoming calls when roaming #351*code#©
Check status of barr all incoming calls when roaming *#351#©
Activate barr all incoming calls **353*code#©
Deactivate barr all incoming calls #353*code#©
Check status of barr all incoming calls *#353#©
Waiting call
Activate call waiting *43*#©
Deactivate call waiting /td> #43##©<
Check status of call waiting *#43#©
Calling Line Identification The following only works if CLIP and CLIR are enabled.(ask your service provider)
CLIP: Incoming call presentation number
Activate CLIP **30#©
Deactivate CLIP ##30#©
Check status of CLIP *#30#©
CLIR: Presentation of one's own number to the to the called party  
Activate CLIR **31#©
Activate CLIR for the actual call *31#number©
Deactivate CLIR ##31#©
Deactivate CLIR for the actual call #31#number©
Check status of CLIR *#31#©
COLP:  Current reached number  presentation  (if called number  was diverted to another number)
Activate COLP *76#©
Deactivate COLP #76#©
Check status of COLP *#76#©
COLR:  Calling party's called number presentation  (if the call was diverted to this cellphone)
Activate COLR *77#©
Deactivate COLR #77#©
Check status of COLR *#77#©

GSM Network Service Codes

Note that at present only the following service codes are in use:
11 Speech
13 fax
25 data

In the future one will be able to control each individual call by use of the following service codes. 
To do this the user has to insert the service code in front of the last # in the MMI command above.

For example the sequence *21*number*16# would divert all SMS calls (and only these) to the given number.

Cellphone services

10 All types of cellphone services
11 Speech service
12 Data service
13 Fax
14 Datex-J
15 Teletex
16 Short message service (SMS)
18 All data services without SMS

19

 All cellphone services without SMS

Carrier services

  
20 All services
21 All asynchronous services
22 All synchronous services
23 3.1kHz services
24 Synchronous point-to-point connections including PAD's (all synchronous data services)
25 Asynchronous point-to-point connections including PAD's (all asynchronous data services)
26 Data packet sending including PAD's (all synchronous data packet services)
27 Services with PAD-share
29 Digital connection with 12kbps