The dial pad is too big and needs to be a little bit smaller like they need to bring it down a little bit there is lots off space at the bottom. it's easier to reach for people who have small hands or if the person is using one hand. Just eliminate the dead space in between
Couldn't find a setting to change the size of the dial key... only for keyboard related stuff.
Maybe... you can find a theme that has a size that fits you better? just a suggestion for now.