I suspect that Telus will roll it out to iPhones next, and our only hope for this year would be next week when iOS 10.2 is probably going to be released to the general public. (They tend to roll out carrier updates at the same time as iOS updates)
But I'm not holding my breath on that. I'm guessing sometime early next year. A big change to their network rolling out VoLTE probably wouldn't happen in December when probably lots of staff are on holidays.