".....We also have a cel phone with telus under her name completely separate from this old sold off collection debt." Julie juliedustin
I'm not sure what the contractural obligations might be under those circumstances. If the new cell phone number is still under the sister's name, at least the right of offset (to recover payments on the old bill) would likely continue indefinitely.
But as far or Telus starting legal action in BC on a contract which originated in Alberta just because the SOL there is 6 years instead of 2 years, it is most doubtful. Business and consumer contracts are provincially regulated. Giving the aggrieved plaintiff the choice of jurisdictions as to where to file the action is restricted to the to the territory within the province where the contract arose.
The action would have to be heard in an Alberta Court; and to enforce any judgment obtained, a writ would have to be applied for in the judicial district where the plaintiff currently resides. However, no judgment was obtained (or can be) in Alberta because the action is governed by the Alberta Limitations Act, not the BC one.
That doesn't mean they still can't bug you about it until 2011 though even if they can't litigate. (See reference below.)
http://www.servicealberta.ca/1009.cfm