Hello. I bought my iPhone 4s in an unauthorised shop as there are no official apple stores in my country. The phone looked great visually, like brand-new. I also checked the serial number and it was unused. It may seem weird but I worry about one thing. If the iphones are taken from the package and examined if it works, if it powers on, then if some of them don' t turn on and appear to be defective, they make repairs of the device, replacing defective parts with unoriginal bad parts and then repacking it again. Is it possible that such thing happens in that unauthorised shop? Also it cost about 425 USD dollars but when I visited apple official web-site it cost 450 USD that time. Isn't that strange? Lower price than in an authorised shop.