Useful phone forwarding options
Forward All:
Activate: *21*[dest]*11#
Cancel & Retain: #21*11#
Re-establish: *21*11#
Cancel & Forget: ##21*11#
Status: *#21*11#
If Busy:
Activate: *67*[dest]*11#
Cancel & Retain: #67*11#
Re-establish: *67*11#
Cancel & Forget: ##67*11#
Status: *#67*11#
if no answer:
Activate: *61*[dest]*11*[sec]#
Cancel & Retain: #61*11#
Re-establish: *61*11#
Cancel & Forget: ##61*11#
Status: *#61*11#
If Unreachable:
Activate: *62*[dest]*11#
Cancel & Retain: #62*11#
Re-establish: *62*11#
Cancel & Forget: ##62*11#
Status: *#62*11#