I worked on a J2ME app that needed to access location on phones without GPS, I was in touch with the operator and got a list of cell ids with lat, lon.

With that I created a daemon in Symbian that would query the cell id and open up a socket server to give it to the J2ME app.

With that we developed an app to request a taxi service, but none of the taxi companies wanted it. Some of the complaints were:

1. GPRS data plans were too expensive for end users 2. No one would put an expensive Sony Ericsson touch phone on a windshield, the windshield would be broken by thieves to steal it. 3. Looking at a screen on the windshield while driving was never going to be approved by authorities.