What have I done to the phone?
When I dial a telephone number the numbers come up white on a white background (VERY hard to see) instead of the normal black numbers on a white background. I cannot find the answer in the manual!

Have you changed the theme?

Choose a different theme

Thanks for the quick replies.I have not changed the theme (or any settings to my knowledge) BUT when i did change the theme to a new one the problem was solved.
Many thanks

I have changed the theme once, and I had the same problem.
I back to the factory theme, and I do not have problem with white "numbers" + white background.