That's not possible. You'd have to change your plan to a tab plus plan. At this point you're only eligable for a normal tab. With that being said, you aren't allowed on the plan if you aren't eligible, which you no longer are, so you would be made to get a new plan
I've had a Saskatchewan plan for 3 years living IN BC . And I've switched from the ace 2 x to a s3 to a s4 without changing my Saskatchewan plan to a bc plan !I've also been told by people who work at the koodo stand to stay with sask Cuz it's cheaper.