Why Settings App Requires SIM Card for Auto Call in Emergency SOS

settings

When navigating to Settings/Emergency SOS on my iPhone 11 Pro, below the "Auto Call" control the hint states that "Auto Call requires a SIM card". I'm trying to establish why this text wouldn't be displayed when referencing the entire Emergency SOS feature; surely a SIM is also required if simply sliding the Emergency SOS slider to call the Emergency Services too?

Best Answer

Emergency numbers can be called without a SIM card in may countries & many phones, including iPhones are designed to allow this, even from a locked screen.
All other numbers need a valid SIM, active account etc etc.