I work for a company that makes telephones. We use 3D printing to make prototypes of new phones so you can actually handle them before we've finished the design. Often a design looks good on the screen but doesn't feel right in the hand. Plus later we can get a transparent model made so we can see if the insides really fit like they are supposed to.

Here at RMP the license on the newer Aery Soul products explicitly prohibits using the model to create tangible reproductions. I don't know about their older stuff, of that from other vendors.