If your iPhone loses signal, calls and messages may not be sent. The main reasons are issues with the SIM card, network settings, or a malfunction in iOS.
Below are quick solutions.
Method 1: Restart the device
- Turn off and turn on the iPhone
- Often resolves temporary connectivity issues
Method 2: Check the SIM card
- Remove the SIM card and reinsert it
- Check for any damage to the card or the tray
Method 3: Reset network settings
- Settings → General → Reset → Reset Network Settings
- All Wi-Fi and VPN will be removed, but the network issue is often resolved
Method 4: Update iOS
- Install the latest version of iOS
- Fixes network bugs and compatibility with the carrier
Additional reasons
- Issues with the carrier's base station
- Roaming restrictions
- Damaged SIM tray or contact
Conclusion
Most often, restarting, checking the SIM card, and resetting network settings help. If the problem persists, contact your carrier.