For example, Can I switch the SIM card in my Samsung Galaxy 2X from Koodo to an unlocked phone and keep using the same plan and also still pay off the tab on the Galaxy 2X? Also if this new unlocked phone is using a different size SIM card than the Galaxy 2X can I change the SIM card of the Galaxy 2X to a different size and put it into the new phone while the Tab gets paid? If a new Nexus phone comes out I plan on switching to that, and the SIM size would be different since the Galaxy 2X is old. I have 2 years left on my Tab, so is it possible to switch the SIM card to one that fits the new phone and keep using the same plan and tab until I eventually pay off the Tab for the Galaxy 2x? So I can use a new phone while paying off the tab for the Galaxy 2x and using the same plan, is it possible?