Orijinal gönderinin sahibi: Minho ,
That box is the rear camera. I would suggest you go through [guide|30962|this guide] and double check that everything is in place correctly. There isn't much free space in an iPhone so it doesn't take much. I would pay close attention to the battery as it may be puffing up and forcing the screen upwards. You may also have a low quality screen and the frame is not sitting properly.