What to do if Galaxy S8 keep showing “No Service” or “Emergency calls only” error

What to do if Galaxy S8 keep showing “No Service” or “Emergency calls only” error

This troubleshooting article will help to learn what to do if Galaxy S8 keep showing “No Service” or “Emergency calls only” error.

There are many possible reasons of ” No Service” or “Emergency calls only” error. Follow the steps below to troubleshoot.

1- Restart if Galaxy S8 keep showing “No Service” or “Emergency calls only” error

 

When dealing with an Android error, first thing is to refresh the system. This is done by restarting Samsung Galaxy S8. For this purpose, follow the steps below:

  • Press and hold the Power button and Volume Down buttons for approximately 10 seconds or until the device power cycles. Note: Allow several seconds for the Maintenance Boot Mode screen to appear.
  • When Maintenance Boot Mode screen appears, select Normal Boot. Note: Use Volume button to move through the available options and the lower left button (below the volume buttons) to select. Also, allow up to 90 seconds for the Reset to complete.

2- Toggle Airplane Mode

Airplane Mode is handy feature. It can turn OFF all network functionalities by tapping a single button. In some cases, it can be an effective way to fix network issues including this problem. If restarting S8 won’t fix the problem, then toggle Airplane Mode from ON to OFF. Follow the step below:



  • On the Home screen or any screen, pull down the notification bar.
  • Look for the Airplane Mode button and tap it to activate.
    Wait for 30 seconds before turning Airplane Mode back off.

If this step is fail to fix “No Service” or “Emergency calls only” error, follow the steps below:

3- Change network mode manually

if Galaxy S8 keep showing “No Service” or “Emergency calls only” error

Sometimes, network issues are fixed by changing network temporarily. If restart and toggling of Airplane Mode won’t work, follow the step below to troubleshoot:

  • Open Settings app.
  • Select “Connections”.
  • Tap “Mobile networks”.
  • Press “Network operators”.
  • Select “Search networks”.
  • Wait for Samsung Galaxy S8 to search for networks.
  • When searching is complete, select another network to connect to. For example, if you’re on T-Mobile, pick AT&T or any other network.
  • The device will be forced to return with an error because it won’t be able to register successfully.
  • Afterwards, select your own network again and see if this step fix the problem.

If the problem is still there, follow the steps below:

4- Reseat SIM card

Removing and re-inserting the SIM card is one of the useful tricks . Before removing the SIM card, make sure that your Samsung Galaxy S8 is OFF. If you’re doing some important work on your phone and you can’t turn it off at this time, consider unmounting the SIM card.

If this step does not resolve the problem, go to next step:

5- Clear cache partition

if Galaxy S8 keep showing “No Service” or “Emergency calls only” error

Android uses a system cache in order to load apps and services faster. As the time pass, this Cache becomes corrupt causing a poor performance and other unexplained issues. System Cache usually become corrupt after installing an Android update or a new app. If ” No Service” or “Emergency calls” error occurs after installing an app or after updating Android. There’s a chance that the problem is due to a bad system cache. To ensure that the system Cache is refresh, clear the Cache partition where it’s stored. To clear the Cache, follow these steps:

  • Turn off the device.
  • Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  • When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  • Press the Volume down key to highlight wipe cache partition.
  • Tap Power key to select.
  • Highlight “yes” by pressing the Volume down key .
  • Press the Power key to select.
  • When the wipe cache partition is complete, “Reboot system now” is highlighted.
  • Press the Power key to restart the device.

6- Check IMEI

to fix “No Service” or “Emergency calls only” error

Devices with null or blocked IMEI won’t be able to register to a network. If you recently purchased a second hand S8, there’s a chance that it may be blacklisted or blocked. This usually happen for the devices reported as stolen. Unfortunately, devices with blocked IMEI can’t reconnect to a network unless the network is unblocked. The blocked can’t be removed simply because the second owner who purchase the phone does not have the necessary proof to provide to the network.
To check if your S8’s IMEI has been blocked, follow these steps:

  • Open the dialer (Phone) app.
  • Enter the code: (*#06#).
  • If the IMEI shows Null, it means that the EFS folder may be corrupted, or may be blocked. In this case, reflash the firmware and observe if it will restore the default EFS folder.

If it does not work, the deviceSamsung S8 can never connect to any network.

Some carriers may block users from accessing advanced menus thru the dialer app. If nothing happens after you enter (*#06#), that means your S8 can’t open advanced menus.
Alternatively, check your S8’s IMEI by visiting http://www.imei.info/.

7- Reset network settings to fix “No Service” or “Emergency calls only” error

 if Galaxy S8 keep showing "No Service" or "Emergency calls only" error
It’s logical to Reset Samsung Galaxy S8 network settings. Follow these steps:

  • Open Settings app.
  • Tap “General management”.
  • Select “Reset”.
  • Press “Reset Network Settings”.
  • Tap “RESET SETTINGS” button.
  • The steps above will reset wifi, mobile data, and bluetooth settings. Enter wifi passwords, re-pair Bluetooth devices, or re-enter VPN credentials again.

 

8- Replace SIM card

to fix “No Service” or “Emergency calls only” error

In other cases, No Service or Emergency calls only error can occur when there’s a problem with the SIM card itself. To see if that’s the case, contact your carrier and ask for another SIM card. If that work either, consider wiping your phone thru factory reset.

9-Factory reset

This procedure will wipe all data and files and restore all software settings to its default factory settings. Before going to proceed, have a back up of all personal data and files.
To factory reset Samsung Galaxy S8, follow these steps:
Back up data on the internal memory. If you have signed into a Google account on the device, it means Anti-theft is activated and it will need Google credentials to finish the Master Reset.

  • Turn off the device.
  • Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  • When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  • Highlight “wipe data / factory reset”, by pressing the Volume down key several times.
  • Press Power button to select.
  • Highlight “yes_delete all user data”, by pressing the Volume down key several times.
  • Press Power button to select and start the Master Reset.
  • When master reset is complete, “Reboot system now” is highlighted. Press the Power key to restart the device.

10- Try flashing Stock Firmware

If No Service or Emergency calls only error coincidentally happened after flashing a custom ROM, it’s possible that it accidentally deleted or corrupted the EFS folder. To fix the issue, try flashing a stock firmware.
This usually restores a corrupted EFS folder. The EFS folder is a critical repository of information such as MEID, IMEI, serial number, config, diag settings and radio settings, etc. Just like any other folder and files, it can be deleted during flashing. Flashing stock firmware to Samsung S8 is not a guaranteed solution for this issue but it’s the last attempt.
If all above steps are unable to fix Samsung Galaxy. It shows that Samsung S8 is not able to connect to any cellular network at all.

11- Let your carrier know

It’s possible that the problem is caused by a network bug or something outdated. If you’re on a GSM network, insert SIM card to another compatible device from the same network and see if the SIM card works. If it doesn’t call your carrier and ask for assistance.

12- Contact Samsung support

If “No Service” or “Emergency calls only” error occur all of a sudden. And you never tried anything like rooting or flashing, it’s possible that there may be a system glitch behind it. In this case, contact Samsung for repair or replace.

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