How to set the white list for Samsung GalaxyS6?

Samsung S6 does not support the whitelist function, but does support the Do Not Disturb function. By turning on the Do Not Disturb function, all calls and prompts of the mobile phone are set to mute, except the selected ones. Opening mode: Settings-Devices-Sounds and Notifications-Do Not Disturb-Open-Allow Exceptions-Alarm Clock/Call/Message-Select the required opening, and set the call/message from the following objects-Select All/Favorites Only/Contacts Only. (This option is optional after the Do Not Disturb function of incoming calls/SMS is turned on at the top. When selected, the remaining phones will be muted. )