GSM Security

Calling Line Identification Presentation (CLIP) affects your reception of CallerID data:

Activate Incoming (CLIP) * 30 # SEND
Deactivate Incoming (CLIP) # 30 # SEND
Verify Incoming (CLIP) *# 30 # SEND

Calling Line Identification Restriction (CLIR) affects your transmission of CallerID data:

Activate Outgoing (CLIR) * 31 # SEND
Deactivate Outgoing (CLIR) # 31 # SEND
Verify Outgoing (CLIR) *# 31 # SEND

Note: These codes only work on some service plans offered by some providers.

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