I have been trying to pair a braille display to my iphone. I have done it before, and that is not the problem. I am using a focus 40 Braille display. It was working before, but now it is not. It connects just fine, and I can see what is on the screen with the display, but I cannot control it using the keys, nor can I type. I am told to access the built in settings on the display, but I do not know how. Is there anyone who could help me? It works just fine with a braille note as a display. Any help would be appreciated. Thank you.