They are too cheap to just reimburse you at a flat $50 rate for your cell phone
This is exactly what they do where I currently work, but not for all employees - only ones that require a phone or have a measurable benefit to having one. It works out to about 50% of the bill. I don't have any issues with that as most vendors/etc I deal with very rarely call outside of office hours. Heck, I just got off my cell phone as I was using it for a work related call. (I have unlimited minutes...)
As an extra bonus, I got to put my personal cell phone on a work sponsored plan through our cell phone carrier (the minutes are unlimited to North America, both calls and texting) - this immediately saved me about $45 a month! I still receive and pay the bill personally, and work still reimburses the flat $50. Heck, we were told we could go onto the cell plan even if we didn't need it for work as the bills don't get sent to the company.
I've got no complaints.