The easiest way to set up call forwarding on any Irish network is to dial **61*[your number]# from your phone and press call.
Vodafone Ireland
Try dialling from your phone and pressing call: **61*[your number]#
If this doesn't work on your Vodafone plan, call Vodafone on 1907 and ask them to set up 'unanswered call divert' to . Takes about 5 minutes.
Three Ireland
Dial from your Three phone and press call: **61*[your number]#
This sets up unanswered call forwarding instantly.
Eir
Dial from your phone and press call: **61*[your number]#
This sets up unanswered call forwarding instantly.
Landline / Other
Dial from your landline and press call: **61*[your number]#
Or call your provider and ask them to set up unanswered call forwarding to your CallBack AI number.