How to Fix Galaxy S25 No Service After Update

If your Galaxy S25 shows No Service, Emergency Calls Only, or keeps dropping to zero bars after an update, the problem is often tied to a modem reset issue, a carrier provisioning mismatch, or a network profile that did not re-register cleanly after the firmware change.

If you want broader help for this device family, visit the Galaxy S25 support hub. You may also need one of the closely related fixes below if the problem started after the same update.

Related fixes worth checking

Fix #1: Force restart the Galaxy S25

Press and hold the Side button and Volume down button together for about 10 seconds. A forced reboot refreshes the modem and can clear a temporary registration failure caused by the update.

Fix #2: Turn Airplane Mode on and off

Swipe down from the top of the screen, enable Airplane Mode for 20 to 30 seconds, then turn it off again. This forces the phone to drop and rebuild its network connection.

Fix #3: Check the SIM or eSIM status

Go to Settings > Connections > SIM manager and make sure your active line is enabled. If you use eSIM and it looks inactive or missing, contact your carrier and ask them to re-provision the line.

Fix #4: Reset network settings

Go to Settings > General management > Reset > Reset mobile network settings or reset network settings on your model. This removes corrupted carrier and radio settings that can block service after an update.

Fix #5: Update carrier services and software

Install any pending Samsung software patch and ask your carrier whether a network settings update is available for your account. Carriers sometimes push backend changes after major updates.

Fix #6: Test service in another area and contact the carrier

If the phone still shows No Service everywhere, check the IMEI and account status with your carrier. A blocked line, failed eSIM activation, or local outage can look like an update issue even when the phone is fine.

When to contact support

If none of the steps above fix Galaxy S25 no service after update, the issue may involve a carrier-side provisioning fault, a hardware failure, or a software bug that needs a follow-up patch. Back up your data and contact the carrier, Apple, or Samsung support if the problem continues.