When “SOS Only” appears on an iPhone, it means the device is only capable of making emergency calls, usually due to network or SIM issues. Here are some troubleshooting steps to resolve this issue and restore normal signal.

Steps to Fix “SOS Only” on iPhone
1. Toggle Airplane Mode: Go to Settings and enable Airplane Mode for 10 seconds, then disable it.
2. Restart iPhone: Restarting can reset network settings and often resolves minor issues.
3. Check for Carrier Updates: Go to Settings > General > About. If prompted, update your carrier settings.
4. Reset Network Settings: Go to Settings > General > Reset > Reset Network Settings. This will remove saved Wi-Fi passwords, so reconnect after.

If the issue persists, contact your carrier to check for network outages or SIM card issues.