title: How iOS central sends incoming calls and SMS notifications to peripheral using BTLE?
body: <p>What I want to know is how could an iOS device acting as central, send information to a electronic device (not iOS device) acting as peripheral, when the iOS device is getting a SMS or an incoming call.</p>
  
  <p>I have read many times that because of Apple's privacy policy, iOS does not allow detecting this, but how devices as coockoo watch respond to incoming calls and SMSs? These events must be detected somehow.</p>
  
  <p>As far as I know these bluetooth devices use a dual bluetooth chip, so they must communicate with iOS device using Bluetooth Low Energy only.</p>