The following GSM call forwarding codes may be used to enable and manage call forwarding options on iPhone devices.
Unconditional forwarding:
Forward service: All Calls
Activate: *21*phone_number#
Cancel & Deregister: ##21#
Cancel & Retain: #21#
Status: *#21#
Reestablish: *21#
Conditional forwarding:
Forward service: If Busy
Activate: *67*phone_number#
Cancel & Deregister: ##67#
Cancel & Retain: #67#
Status: *#67#
Reestablish: *67#
Forward service: If Not Answered
Activate: *61*phone_number# Continue reading “iPhone Call Forwarding Codes”