?Undocumented Codes?

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Activating Enhanced Full Rate (EFR)
Activating Half Rate (HFR)
Checking Whether Your SIM Supports Clock Stopping
Call Diverting
Call Barring
Call Wait/Hold
Call Line Identity (CLI)
Diverting Data Calls
Diverting Fax Calls


Activating Enhanced Full Rate (EFR)
*3370# activates EFR 
#3370# deactivates EFR 
Having it enabled will improve sound quality noticably, but decrease battery life by 5% 
It will also only give some benefit when the service provider supports it.

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Activating Half Rate (HFR)
*4720# activates HFR 
#4720# deactivates HFR 
Deactivating this increases battery life by about 30% but it dramatically reduces call quality.
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Checking Whether Your SIM Supports Clock Stopping
*#746025625# 
This checks to see whether your SIM card supports clock stopping. Older SIM cards do not and will substantially reduce your battery life. In extreme cases, the effect of having a SIM which doesn't support clock stopping can reduce the standby time from 7 to 2 days! So if you have a SIM which doesn't support clock stopping then it would be advisable to get it changed.
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Call Diverting
Immediate 
To Activate: * * 21 * NUMBER # [SEND] 
To Cancel: # # 21 # [SEND] 
To Check: * # 21 # [SEND] 
Time Delay 
To Activate: * * 002 * NUMBER * * (Time 5 to 30 Seconds) # [SEND] 
To Cancel: # # 002 # [SEND] 
To Check: * # 002 # [SEND] 
Conditional 
To Activate: * * 004 * NUMBER * * (Time 5 to 30 Seconds) # [SEND] 
To Cancel: # # 004 # [SEND] 
To Check: * # 004 # [SEND] 
No Answer 
To Activate: * * 61 * NUMBER * * (Time 5 to 30 Seconds) # [SEND] 
To Cancel: # # 61 # [SEND] 
To Check: * # 61 # [SEND] 
Unreachable 
To Activate: * * 62 * NUMBER # [SEND] 
To Cancel: # # 62 # [SEND] 
To Check: * # 62 # [SEND] 
Engaged 
To Activate: * * 67 * NUMBER # [SEND] 
To Cancel: # # 67 # [SEND] 
To Check: * # 67 # [SEND] 
To Cancel All Call Forwarding 
# # 002 # [SEND]
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Call Barring
Barring All Outgoing Calls 
To Activate: * 33 * BARRING CODE# [SEND] 
To Cancel: # 33 * BARRING CODE # [SEND] 
To Check: * # 33 # [SEND] 
Barring All Outgoing International Calls 
To Activate: * 331 * BARRING CODE# [SEND] 
To Cancel: # 331 * BARRING CODE # [SEND] 
To Check: * # 331 # [SEND] 
Barring All Outgoing International (except to home country) Calls 
To Activate: * 332 * BARRING CODE# [SEND] 
To Cancel: # 332 * BARRING CODE # [SEND] 
To Check: * # 332 # [SEND] 
Barring All Incoming Calls 
To Activate: * 35 * BARRING CODE # [SEND] 
To Cancel: # 35 * BARRING CODE # [SEND] 
To Check: * # 35 # [SEND] 
Barring All Incoming Calls Whilst Outside Home Country 
To Activate: * 351 * BARRING CODE # [SEND] 
To Cancel: # 351 * BARRING CODE # [SEND] 
To Check: * # 351 # [SEND] 
Barring All Calls 
To Activate: * 330 * BARRING CODE # [SEND] 
To Cancel: # 330 * BARRING CODE # [SEND] 
To Check: * # 330 # [SEND] 
Barring All Outgoing Calls 
To Activate: * 333 * BARRING CODE # [SEND] 
To Cancel: # 333 * BARRING CODE # [SEND] 
To Check: * # 333 # [SEND] 
Barring All Incoming Calls 
To Activate: * 353 * BARRING CODE # [SEND] 
To Cancel: # 353 * BARRING CODE # [SEND] 
To Check: * # 353 # [SEND] 
Cancelling All Call Barring 
# 330 * BARRING CODE # [SEND]
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Call Wait/Hold (avviso di chiamata)
To Activate: * 43 # [SEND] 
To Deactivate: # 43 # [SEND] 
To Check: * # 43 # [SEND] 
To end the call on hold or set UDUB (User Determined User Busy) for a waiting call press: 0 [SEND] 
To end the current call press and accept the call on hold or waiting: 1 [SEND] 
To release a specific call (where this call is X) press: 1X [SEND] 
To place active call on hold and accept the other held or waiting call press: 2 [SEND] 
To activate a specific call (where this call is X) and place all other's on hold press: 2X [SEND] 
To add the held call to the current conversation press: 3 [SEND] 
To make a new call and place current call's on hold enter: Number [SEND] 
To end all call's together (except a waiting call) press: [END]
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Call Line Identity (CLI)
Outgoing 
To Activate: * 31 # [SEND] 
To Deactivate: # 31 # [SEND] 
To Check: * # 31 # [SEND] 
Incoming 
To Activate: * 30 # [SEND] 
To Deactivate: # 30 # [SEND] 
To Check: * # 30 # [SEND]
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Diverting Data Calls
No Reply 
To Activate: * * 61 * NUMBER * 25 # [SEND] 
To Cancel: # # 61 * 25 # [SEND] 
To Check Status: * # 61 # * 25 # [SEND] 
Time Delay 
To Activate: * * 61 * NUMBER * 25 * (Time 5 to 30 seconds) # [SEND] 
To Cancel: # # 61 # * 25 # [SEND] 
To Check Status: * # 61 # * 25 # [SEND] 
Unreachable 
To Activate: * * 62 * NUMBER * 25 # [SEND] 
To Cancel: # # 62 # * 25 # [SEND] 
To Check Status: * # 62 # * 25 # [SEND] 
Busy 
To Activate: * * 67 * NUMBER * 25 # [SEND] 
To Cancel: # # 67 # * 25 # [SEND] 
To Check Status: * # 67 # * 24 # [SEND] 
Unconditional 
To Activate: * * 21 * NUMBER * 25 # [SEND] 
To Cancel: # # 21 # * 25 [SEND] 
To Check Status: * # 21 # * 25 # [SEND]
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Diverting Fax Calls
Diverting Fax Calls
No Reply 
To Activate: * * 61 * NUMBER * 13 # [SEND] 
To Cancel: # # 61 * 13 # [SEND] 
To Check Status: * # 61 # * 13 # [SEND] 
Time Delay 
To Activate: * * 61 * NUMBER * 13 * (5 to 30 seconds) # [SEND] 
To Cancel: # # 61 # * 13 # [SEND] 
To Check Status: * # 61 # * 13 # [SEND] 
Unreachable 
To Activate: * * 62 * NUMBER * 13 # [SEND] 
To Cancel: # # 62 # * 13 # [SEND] 
To Check Status: * # 62 # * 13 # [SEND] 
Busy 
To Activate: * * 67 * NUMBER * 13 # [SEND] 
To Cancel: # # 67 # * 13 # [SEND] 
To Check Status: * # 67 # * 13 #[SEND] 
Unconditional 
To Activate: * * 21 * NUMBER * 13 #[SEND] 
To Cancel: # # 21 # * 13 # [SEND] 
To Check Status: * # 21 # * 13 # [SEND]

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1999 Vinay Manro
Disclaimer
I can NOT be held responsible for any damage caused through use of this web site, or any information contained within it.