SOS! How do you set up your iPhone to make emergency calls?
With Emergency SOS, you can quickly and easily summon help and alert your emergency contacts.
When you call SOS, your iPhone automatically dials the local emergency number. In some countries and regions, you may need to choose the service you need. For example, in mainland China, you can choose police, fire or ambulance.
You can also add emergency contacts. After an emergency call ends, your iPhone alerts your emergency contacts with a text message unless you choose to cancel. Your iPhone sends your current location and for a certain period of time after you activate SOS mode, your emergency contacts receive updates when your location changes. Source: Using Emergency SOS on your iPhone - Apple Support
Making an emergency call through your iPhone
iPhone 8 and newer: Press the side button and one of the volume buttons until the Emergency SOS slider appears. It counts down to 5 with sound and will make the emergency call.
Is the emergency call not working? Then adjust via settings: Call with Side Button.
Add emergency contacts in iOS?
If you want to add emergency contacts go on your iPhone to: Settings -> Emergency SOS.
Then select the desired emergency contacts from your phone list.
Alternative 112 App in Belgium
The 112 BE app is the official app for Belgian emergency services. After you register in this app, you can make an emergency call for help from an ambulance, the fire department or the police. The emergency centers will then automatically receive an indication of your location and who you are. If it is not possible to communicate by voice, the operator can exceptionally activate a chat function as well.
Learn more: https://www.112.be/nl/app