If you are having issues texting or navigating with your keypad, it might be necessary to replace your old keypad with a new one.
Remove all 4 screw covers from each corner on the back cover.
Unscrew all 4 screws from the back cover of phone.
Pull rubber keyboard off carefully.
NOTE: Be sure not to remove the silver button panel below the keyboard
Align the keyboard with four gold tabs at the top of the keyboard.