I know of a method to get rid of the ugly white dialer interface on the Galaxy S4. Other carriers may have the dark interface. You can use apktool to edit the GUI of the dialer. I just can't do it efficiently. Using dialers from the play store is pointless. I wish there were some configurations or modified SecPhone.apk replacements for the original one. Of course it would be wise to keep a backup of the original. I'm so sick of this bright white dailer. It's such an eye sore.