hmm i don't think it make sense leh, DSLR isn't just sensor itself, there's also mirror thing inside the camera, and special design for ultra fast focus which cannot be done on regular digicam, of course you can also mount many kinds of lense you want.

not to mention DSLR has big sensors which highly unlikely can be fit into a phone, unless you wanna bring a true brick around (hmm maybe the old dai koh dai can fit in ).