Best answer by Dennis
If the plan I currently have is grandfathered then I'm wondering if BYOD allows me to keep the plan or will I have to choose a new plan.
You just take your sim out and put in in the new phone. No need to change plans.
Or is you are getting the phone on tab from Koodo, here are the ugrade tab rules with older plans
So when you reach the select plan screen there should be an option to keep your current plan