Forwarding calls after a certain duration to your voicemail or other number can be found here.
All other options to forward a call:
• Forward calls when your phone is off or has no signal.
Activate: ** 62 * forwarding number #
Deactivate: ## 62 #
• Forward calls if you’re already on the phone with someone.
Activate: ** 67 * forwarding number #
Deactivate: ## 67 #
• Forward all calls.
Activate: ** 21 * forwarding number #
Deactivate: ## 21 #
The forwarding number can be your voicemail number +32486191933 or any other phone number.