Nova Launcher>Press and Hold Screen>Select Widgets>Under Nova Launcher Widgets Select Activities and drag the icon to the home screen. A list of Activities pops up. Scroll down to Phone [there's 3 options for phone. Pick the one will 99 in the right corner.] Scroll down and select Mobile Data.
Thanks. However, It really did not find this from my note 7. What happened? My note 7 SM-G930fd