I have a Samsung which still isn't fully paid out... My dad is giving me his old iPhone 4S so do I have to first pay out my Samsung before I can switch to the iPhone? And how do I swap phones but keep the same number? And it is a rogers iPhone.
Just pop your old sim into the Iphone 4S, if the sim is a different size you can purchase one for 10$, this way you keep your number, you would still be paying off the tab while using the iPhone if that makes sense. :)
Edit: the iPhone 4s would have to be unlocked