I just bought a new Nokia Lumia 920, international model. Love the OS and the flow of the phone but it has big issues reading the sim card (i changed 3 at my mobile operator) sometimes it regognise the sim card but soon after i get the error reading sim card, and there is a 1cm( or so) dark stain in the camera and it can be seen on all photos, I updated to black update and rom flash and all what i found on forums and internet but nothing helps...