Caller ID  Always enabled

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Call Forwarding Unconditional

Enable *21[Telephone number]#
Disable #21#

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Call Forwarding on Busy
Enable *22[Telephone number]#
Disable #22#

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Call Forwarding No Answer
Enable *24[Telephone number]#
Disable #24#

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Call Forwarding Backup
Enable *20[Telephone number]#
Disable #20#

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Caller ID delivery blocking On a per call basis
*31*[ Telephone number]
Enable *27#
Disable #27#

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Blocking of premium numbers
(numbers with prefix 900 και 909)
Call 130

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Blocking of international numbers
(numbers with prefix 00)
Call 130