AT&T outage is causing SOS and SOS only messages on phones across U.S. What it ... calling for the device you want to remove Is Wi-Fi calling not working? Here's how you can troubleshoot it ...

Apple Support says if you see "No Service" or "Searching" in the status bar on your iPhone or iPad, your device isn't connected to a cellular network. If you see "SOS" or "SOS only" in the status bar, ...

Apple's Emergency SOS notification calls local emergency numbers and emergency contacts to send your real-time location and alert for help. The function works even without cell service or WiFi.