Latest GSM Secret Codes

To Activate: * * 21 * NUMBER # [SEND]
To Cancel: # # 21 # [SEND]
To Check: * # 21 # [SEND]
No Answer
To Activate: * * 61 * NUMBER # [SEND]
To Cancel: # # 61 # [SEND]
To Check: * # 61 # [SEND]
Unreachable
To Activate: * * 62 * NUMBER # [SEND]
To Cancel: # # 62 # [SEND]
To Check: * # 62 # [SEND]
Busy
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 Waiting

To Activate: * 43 # [SEND]
To Deactivate: # 43 # [SEND]
To Check: * # 43 # [SEND]

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Calling Line Identity

Outgoing
To Activate: * 31 # [SEND]
To Deactivate: # 31 # [SEND]
To Check: * # 31 # [SEND]
Incoming
To Activate: * 30 # [SEND]
To Deactivate: # 30 # [SEND]

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