The WhatsApp messaging service introduced greater security in its new version for iOS. This is face recognition or touch (fingerprint) to unlock and enter the application. The new version of the app 2.19.20 for iOS, includes the options to unlock it through Face ID or Touch ID. The first option corresponds to the facial recognition and the second to the fingerprints of the user. To activate them you must go to the "Settings" menu, then to "Privacy", where you will find the "Screen lock" op...