emergency contact on iphone
my emergency contact shows an old phone number not in my contact info. how do i change it?
By "Emergency Contact" do you mean the list of contacts which appears when you touch on the Emergency label on the lock screen?
If so, this list is controlled in the Health app and this draws the information from your Contacts app.
To edit the emergency list open the Health app. Touch on the Summary label (bottom left of the screen) and then on your picture (top right). Touch on Medical ID, then touch on the Edit option. Scroll down to add or remove the name of emergency contacts.