My first Internet phone was the Nokia 9000, which was limited to GSM (9600bps). I built and debugged one of the first major music streaming services on that connection because I was working remote and my DSL got cut off. I had to add a 2Kbps stream option to the production servers for myself just so I could test it.
Yes! I was so excited he had that phone in the movie.
They even include an owner in-joke, which means someone in the production must have owned one of these phones. Everyone I lent the phone to would pick it up the "wrong" way -- they would put the external screen to their face, like every other phone. But the mic and speaker were on the back. I had to quickly find the scene in the movie here:
Fortunately - Symbian was painful. It was designed with a half-baked C++ standard and devices with 1-2 MB of RAM in mind and apparently never thoroughly upgraded.