*20 - Call Forwarding (Include Destination Number)
Example: *205551113333

*21 - Disable Call Forwarding

*22 - Do Not Disturb - Send to Busy

*23 - Do Not Disturb - Send to Voicemail

*24 - Disable Do Not Disturb

*25 - Set Failover Number (Include Destination Number)
Example: *255551113333

*26 - Set Failover to Voicemail

*27 - Blacklist Last Caller

*67 - Block Caller ID (For Next Call Only)

*30 - Block Caller ID (For All Calls)

*68 - Unblock Caller ID (For One Call)

*31 - Unblock Caller ID (For All Calls)