Oreo beta 4 on Galaxy S8 Settings > Apps > "3 ..." upper right Special Access. Install from Unknown Sources Lists Internet, keyboard, Messages etc Messages is enabled by default. All of them in b3 were enabled. Is the one in Security now a master switch? Are these independent? Of what use and value? They could be turned into backdoors through a link in Messages, phishing email, keylogger. And if they remain I'll n some form, even if removed from Settings. Very vulnerable to abuse or malware or governments.