In order for this method to work you need  a rooted phone with Xposed Installed. If you want to know How to root? or How to Install Xposed Framework? please refer to our post at Game Fantasy . The First step of this process is to install Flat Style Keyboard app/xposed module from below links- https://play.google.com/store/apps/details?id=com.bocharov.xposed.fskeyboard&hl=en