Because of sight problems I need a phone with a display that has light text/icons on a dark background. The screen needs to be large and easy to read (the ability to increase font sizes would be a bonus). The local stores are generally unable to say what (if any) phones have this. So, can anybody here offer any suggestions? I'm not looking for anything too fancy, as all it really needs to do is make phone calls. I'm also looking to spend as little as possible (within reason). Would like something that is available on Orange Just Talk, so that I can use my existing sim.