Recently, we had reported that a few quick setting toggles in the Galaxy S6 and S6 edge have gone missing. These toggles included data hotspot, mobile data, and private hotspot. Most of these toggles are those which trigger mobile data.
Despite the fact that an unofficial fix was available earlier, Samsung has taken the notice of this issue recently, and released an official fix for getting the toggles back.
Samsung has released an app for getting the toggles back. This app is available on the Galaxy App Store, and is named QuickPanel Restore. Opening the app and touching the Restore button in the app brings all the toggles back. Yet, Samsung has not announced why these toggles went missing.