I had problems a couple of years ago with an employer not wanting to supply me with a cell phone (I was working as a consultant and spent all of my time at a customer in a different town). I ended up changing my private cell phone number and refusing to give it to the employer, I made sure that they knew I had a cell phone however. This at least made them see the problem but I ended up quitting the job after a couple of months as they still refused to solve the problem.
Slashdot Mirror
I had problems a couple of years ago with an employer not wanting to supply me with a cell phone (I was working as a consultant and spent all of my time at a customer in a different town). I ended up changing my private cell phone number and refusing to give it to the employer, I made sure that they knew I had a cell phone however. This at least made them see the problem but I ended up quitting the job after a couple of months as they still refused to solve the problem.
Good luck!