Depends on the phone,
Samsung have a "secure" folder, (used to be called knox)
and in here you can add a new whatsapp, kik, text, browser, email etc or whatever, you can use a service like "hushed" or other burner number offerings to create a new number that you use to text or call from, you can then verify pretty much any App you need to with this number.
Its basically 2 phones in one, without the sim and hidden behind a security lock to enter.
Does have some drawbacks but works well for me