> It is unclear how Jurassic Park crew got their hands on a Motorola Envoy

The head of frogdesign (Hartmut Esslinger) ended up running into Spielberg on a plane and showed it to him. The one in the movie is an original mockup.

Source: https://www.therpf.com/forums/threads/jurassic-park-tablet-d...

Discussion: https://news.ycombinator.com/item?id=46752261