frequency of purchasing a new cellphone

Yup I tend to buy new ones. I usually try to own the same for one year but sometimes that doesn't work :D And yes I would say it was a bad habit..

My cellphone is on a contract and I get a free upgrade near to the end of my contract. I am not one for having the latest technology in phones, I only recently got a phone with a camera, now that is a must when I upgrade as I find it very useful. As long as the phone makes and receives calls and texts and has bluetooth for my handsfree carphone setup then that's all I require (and the camera).