Smart divert offers you more choice for diverting your calls. Not only can you divert your calls permanently, you can set your phone line to only divert the calls when you are engaged, or when not answered after 15 seconds.
To use Smart Divert you need to dial the below codes, followed by the number then #
Divert all calls: *21*
Divert calls when not answered within 15 seconds: *61*
Divert calls if phone is engaged: *67*
To remove the diverts, dial the same code again but replace
the * with # i.e #61#