I currently have an iPhone 5s from Koodo with my tab paid off. I want to get the iPhone 6s now but not with tab since it's at least 15 extra dollars added onto my plan every month. THe retail price is still in the $900 range for it at Koodo but to buy unlocked at the Apple Store it's cheaper in the $700 range. So would I be better off just buying it from the Apple Store and putting my iPhone 5s SIM card into it? Also, would I still get to keep my current monthly Koodo plan that way?