How to Fix Galaxy S26 No Service After Update

Galaxy S26 No Service After Update usually means the phone failed to reconnect to the carrier, the SIM or eSIM profile did not register properly, or network settings were damaged after the software change.

For related help, also see How to Fix Galaxy S26 Mobile Data Not Working After Update, How to Fix Galaxy S26 Mobile Hotspot Not Working After Update, How to Fix Galaxy S26 Texting Problems, and the Galaxy S26 hub.

Method 1: Toggle Airplane mode and restart

This forces the Galaxy S26 to disconnect from the tower and register on the network again.

1. Turn Airplane mode on for 15 seconds.
2. Turn it back off.
3. Restart the phone and watch whether signal bars return.

Method 2: Check SIM or eSIM status

An update can sometimes disable the line temporarily or make the device lose the carrier profile.

1. Open Settings > Connections > SIM manager.
2. Confirm the SIM or eSIM line is enabled.
3. If you use a physical SIM, reseat it carefully and test again.

Method 3: Select network mode automatically

Manual network settings can keep the phone from attaching to the strongest available service after an update.

1. Open Settings > Connections > Mobile networks.
2. Make sure network selection is automatic.
3. Use the default recommended network mode for your carrier.

Method 4: Reset network settings

This removes bad carrier, Wi-Fi, and Bluetooth network data without deleting personal files.

1. Open Settings > General management > Reset.
2. Tap Reset network settings.
3. Reconnect to your carrier settings and test calls and data again.

Method 5: Check for carrier outage or reprovision the line

If the phone still shows No Service, the issue may be on the carrier side rather than the device itself.

1. Test the SIM in another compatible phone if possible.
2. Contact the carrier and ask them to reprovision the SIM or eSIM.
3. Install any follow-up system update if Samsung releases one.

If the phone still has no service after all of the steps above, visit the main Galaxy S26 page for more cellular troubleshooting guides.