I am considering purchasing a Braille display I can use with my iPhone. Would I need to pair any of the displays more than once? If I purchase a device such as a traditional notetaker with a qwerty keyboard, will i need to enter quick nav to enter text as I do with my Apple bluetooth keyboard? How do you enter a password that has capital letters, numbers, and other symbols if the device has a Perkins style keyboard? Is there a device that works better with the iPhone? I am considering the focus 40 blue from freedom Scientific and the Hims products. Thank you.