As you know, there are many WordPress templates that changes into smartphone design, but there are templates that doesn`t.
There are also times that you want to make the smartphone design completely different from the PC design.
I suggest using "WPTouch Mobile Plugin" for these situations.
This doesn`t change by fitting it`s layout to different devices (Responsive design), but it will separate from PC and smartphone design by the system.
You can change the smartphone design because the system will be different from the PC.
I will tell you how to install.
Click left menu "Plugin".
Next, click "Add new".
On the "keywords section" type "WPtouch" to search.
The button will change to "activate", click the button.
There`s "WPtouch" button on the left menu. Click the button.
First, you should check the type of devices.
I suggest you check all the devices.
If you want to customize the page button, click "Menu Settings"
and click "Go to menu settings".
Click "WPtouch Header Menu", and save.
You can change the theme color by clicking the "Customize Theme".
You can also buy several themes from "Theme".
I suggest you using this when you want to change the smartphone design entirely different from the PC design.
You can change the color by selecting the "color"
There are much more settings for "WPTouch Mobile Plugin", so please use this plugin if you want to change the design for your smartphone website.