Not sure if this has been asked. But I wanted to know if anyone has done the Samsung Upgrade thingy. Can it be any handset you can hand in or does it have to be a Samsung handset? The T&C's don't make this clear. And by them saying they will pay the remaining balance on your current plan, does this mean they pay off the rest of the tariff or just the phone? I'd be very interested in this. Since my LG G4 is not back from repair.