So I currently have a tab balance of $113. I wanted to put this towards an iphone 5c which retails for $625 according to the koodo website. Which means I would need to pay the remaining balance of $512 and then keep my existing plan. However, there is no option to do that online. Would I need to do this in store? I don't need the full subsidy from tab large nor do I want a tab large plan. Thanks for any help.