Question: iphone 6s call forwarding not working
As per the title. Attempted setup from backup and as a whole new device. Reset, hard reset and full factory reset did nothing. Multiple SIM cards were essayed to no effect. Multiple PHONES were tried, with the exact same problem. Went through all level tech support both with the carrier (Bell Canada) and Apple. The latter took the relevant diagnostic data and submitted it to engineering.
I offer this information for anyone else suffering the same issue.