Having been feeling that I wasn't using my mobile phone enough to justify the monthly outlay, I called up the operator who offered to reduce the rental fee to £0 a month with still enough minutes and texts included to cover my typical usage. I'll believe this when the first bill comes through...
[rab] Get rid of it, you obviously don't need the infernal machine. I have had the dubious pleasure of using one for my business. My experience was that customers were happier to leave a message on my answering device rather than 'phone me on the mobile.