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How do I activate the secret number option on my mobile?
It is better to activate the secret number option on your GSM device. Consult your manual, the vendor or the manufacturer of your GSM device to see how to activate the secret number option (CLIR).
You can temporarily hide your number during a call by typing a code:
#31# (phone number) and then press the send key (green phone).
Please note! Enter your correspondent's phone number and not yours