Thank you for your reply. I 'm using AI CC 2015. When I select iPhone5 as the device, the artboard size it gives me is 1136px (height) * 640 (width). I do not see “resolution independence” when setting up my artboard.
Trying to upload a screenshot but not sure if you could see it.
<imgsrc="/uploads/db4094/original/1X/ae8ea902ab618cf6c24832495445166d1ace52fe.png" width=“546” height=“500”>