I have an iPhone 6 on iOS 8.1.2 and just received a call from one of my contacts who has a contact pic. When the call came in, my phone did NOT display the contact pic in full screen but rather just a circle of the pic, in the top right of the display (when the phone was ringing). I then remember that this 'full screen contacts' was one of the features touted in iOS 8 (think it was removed in iOS 7 somewhere) so now wondered why my phone was STILL not displaying the full pic, when it rang. I then tested this by ringing my iPhone from my house, which also has a contact pic, and this displayed the same thing (when the phone was ringing, the small circle of the pic, showed in the top right of the display, instead of the full screen). I then thought that this could be down to the pic itself so I went into my home contact and changed the pic and then called my iPhone again. This time, whilst the phone was ringing, the pic DID indeed display in the full screen. Does this mean that I now need to go through ALL my contacts and edit the pictures, if I want them to display in full screen mode, when they call me?!