MMI codes from @FreedomMobile 611 support:
Conditional forwarding (when busy + when unanswered + when unreachable) to a Canadian phone number …
- To activate: *004*1nnnnnnnnnn#
- To deactivate: ##004#
Unconditional forwarding (phone won’t ring, with $0.75 charge per call) …
- To activate *21*1nnnnnnnnnn#
- To deactivate ##21#
Last year, conditional forwarding resulted in phone charges in Japan and China, even though I didn’t pick up the phone. This year, will try unconditional forwarding to my IP phone number.
Some years ago, on Bell Mobility, had the No Answer Transfer service, which is distinct from their Call Forwarding label.
Found corroborating hints at support.youmail.com.