On my Asha 302 the bottom half of the keyboard is hardly lit up and difficult to see. Only the top 2 rows are appropriately lit up, the bottom 2 rows are almost dark. Is this a general design flaw or an issue with my particular device?
The backlight on your phone's keypad should have the same strength for all the lights. In order to get your device checked for faults, I advise you to visit your local Nokia Care Point.
Let us know how you get on and feel free to post any other questions you may have.