I wanted to follow up on my progress with the EVFC + Sympatico service problem...
When I first called Bell, I called the wrong lines - no-one I knew understood that I was using EVFC, and hence no-one knew that it had to go over the VDSL line. As a result, my service plain wouldn't work, and I got passed off to anti-tech support who (in an effort to get me off the line) told me I had to cancel my service and get the condo owner to sign up for the Sympatico service.
At my wit's end, I tried another number - one from an EVFC brochure given to me when I got the place. And wouldn't you know it? I don't have to cancel my account or anything - they switched the account to the VDSL line right away, got me signed up for the wireless modem, and are sending a tech out to me next Thursday! (A competent, VDSL tech this time.)
I'm really glad I came to this resolution - I didn't want to terminate my Sympatico service.
My only complaint would be that Bell support wasn't informed enough to know about the EVFC service and to direct me to that line in the first place - it would have saved me a lot of headache and time.