Purchased a used XS last week that still has warranty on it till early next month. Took it into Apple to today to see if there was any chance of having the phone swapped with it still being under warranty. Initially the Genius bar guru ran his checks to see if he could find any faults that I'd disclosed which he was unable to do as the phone had been reset prior to taking it in. He then suggested doing a firmware reset which I agreed to. Once he plugged the phone into his Mac, he advised me that the phone was purchased in Hong Kong therefore they (UK) Apple store could not cover me from a hardware perspective due to the dual sim differences. However when I got home to check the sim tray, it looks no different to my UK 6s!! So a little confused... Any ideas?