I believe that with effort, time and brick sculpting tools you could buy a brick and turn it into a cell phone. Albeit heavy, uncomfortable and pointless.
Slice two sections maybe 1/4 inch thick, hollow them out (so they look like picture frames. Cut a thin slice for a battery cover, drill some slits to put the battery door locks into. Make some air vents for heat release. Take your D1 apart and put the internals inside it and secure them (somehow). Then take the screen and secure it. (I have a theory on how to secure it but it's too much typing. Now glue the two brick pieces together. Voila! A brick that became a phone.