How to fix Galaxy Tab S4 “Not Registered On Network” error

This troubleshooting article gives you the details in fixing “Not Registered On Network” error on Galaxy Tab S4. If you are one of the unfortunate users to have this problem, don’t worry as the solutions are usually within your grasp.

“Not Registered On Network” is one of the common errors that can occur on any smartphone. If your Galaxy tablet is unable to connect to mobile data because of this error, or if it’s having a hard time using any of its network functions because of this bug, learn what you can do below.

Simulate a “battery pull.” Restarting the system should be the first thing to do in this case. Many temporary network bugs are fixed by doing this simple step. If you haven’t tried doing this yet, here’s what you must do:

  1. Press and hold the Power + Volume Down buttons for approximately 10 seconds or until the device power cycles. Allow several seconds for the Maintenance Boot Mode screen to appear.
  2. From the Maintenance Boot Mode screen, select Normal Boot. You can use the volume buttons to cycle through the available options and the lower left button (below the volume buttons) to select. Wait for up to 90 seconds for the reset to complete.

This procedure simulates the effects of physically disconnecting the battery. Your device has a non-removable battery pack so this is the alternative to the old way of restarting a frozen or erratic device. This also works at times for many network issues so hopefully this helps. If nothing changes though, proceed to the next steps below.

Check for on-going network issue. If “Not Registered On Network” error happens all of a sudden, it’s possible that it may be the result of a service disruption. If you have other phones on the same network, try to see if they also show a similar error. If multiple phones are unable to connect to your network, what you can do is to simply wait for the problem to be fixed. In some cases, a carrier may intentionally disable their cellular services to comply with security requests from the government. In other cases, an unexpected outage may be to blame. As an end user, there’s nothing much that you can do about that.

Reset network settings. At other times, “Not Registered On Network” bug can be due to a device network settings not properly configured. To ensure that your Galaxy Tablet has all the correct settings, try resetting its network settings with these steps:

  1. Open Settings app.
  2. Tap General management.
  3. Tap Reset.
  4. Tap Reset Network settings.
  5. Tap RESET SETTINGS button to confirm.
  6. Restart your S8 and check for the problem.

Check SIM card. Sometimes, “Not Registered On Network” bug can also be caused by a fault in a SIM card. To check, you can either insert another working SIM card from your carrier, or you can insert your SIM in another compatible phone. Either way should help you check the health of the card, or whether it’s functional or not. Make sure to do the following:

  1. Turn off your phone.
  2. Remove the SIM card carefully.
  3. Wait for at least 10 seconds before turning the phone back on.
  4. Then, re-insert the SIM card and check for the problem.

Observe on Safe Mode. Another possible reason for this error is a bad app. Some poorly coded app may be interfering with Android or its functions. To see if network settings is affected by a third party app, run the phone to safe mode. In Safe Mode, no third party apps will be allowed to run. So, if there’s no “Not Registered On Network” error while your Note9 is on safe mode, that’s a sign that a bad app must be the cause. Here’s how to restart your phone to Safe Mode:

  1. Turn the device off.
  2. Press and hold the Power key past the model name screen.
  3. When “SAMSUNG” appears on the screen, release the Power key.
  4. Immediately after releasing the Power key, press and hold the Volume down key.
  5. Continue to hold the Volume down key until the device finishes restarting.
  6. Safe mode will display in the bottom left corner of the screen.
  7. Release the Volume down key when you see Safe Mode.

To identify which of your apps is causing the trouble, you should boot the phone back to safe mode and follow these steps:

  1. Boot to safe mode.
  2. Check for the problem.
  3. Once you’ve confirmed that a third party app is to blame, you can start uninstalling apps individually. We suggest that you begin with the most recent ones you added.
  4. After you uninstall an app, restart the phone to normal mode and check for the problem.
  5. If your device is still problematic, repeat steps 1-4.

Reset app preferences. In some cases, apps may encounter problems if one or a number of default or core system apps and services are disabled. To ensure that all your apps have access to defaults apps, do the steps below:

  1. Open Settings app.
  2. Tap Apps.
  3. Tap on More settings at the upper right (three-dot icon).
  4. Select Reset app preferences.
  5. Restart your S9 and check for the problem.

Factory reset. Should nothing change at this time, consider wiping the phone to return all software settings to their defaults. Make sure to back your personal data up ahead of time. Follow the steps below to factory reset your phone:

  1. Create a backup of your data.
  2. Turn off the device.
  3. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  4. When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  5. Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  6. Press Power button to select.
  7. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  8. Press Power button to select and start the master reset.
  9. When the master reset is complete, ‘Reboot system now’ is highlighted.
  10. Press the Power key to restart the device.

Contact network operator. This is the final troubleshooting step for you. Not all network troubles is device-related. A fairly good number of them also comes from carrier or network side. Be sure to report the problem to them if none of the things we suggest in this post help.