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Generally, CLIP (Calling Line Identity Presentation) displays the number of the mobile phone calling you on your phone’s screen.
After an appropriate period the service will be renewed automatically. If you don’t have enough funds on your balance the service will be renewed right after top-up automatically. If the service is not active, you will not be able to make a hidden call by dialing #31#.
After an appropriate period, the service will be renewed automatically.
To deactivate the services SMS STOP to 5909