How to fix No 4G LTE signal on Galaxy S10 | troubleshoot network issue on Galaxy S10

Some Galaxy S10 have trouble when switching back to 4G LTE network. If your S10 has No 4G LTE signal, or if it will not automatically connect to 4G on its own, this guide will help you to fix No 4G LTE signal on Galaxy S10 | troubleshoot network issue on Samsung Galaxy S10.

How to fix No 4G LTE signal on Galaxy S10 | troubleshoot network issue on Galaxy S10

If your device is not working as expected, go through this troubleshooting guide. In this post, learn how to fix the error if your S10 has no 4G LTE signal. Follow the steps below.

1- Forced reboot to fix No 4G LTE signal on Galaxy S10

New Galaxy S10 tends to be unable to fully switch back to 4G LTE network on slower network modes such as 2G or 3G. Although Samsung has not released official explanation why this error occur. Apparently, in some cases the device can’t automatically detect and use 4G LTE. It doesn’t mean there’s a network issue because most of the time the issue resolve without doing any troubleshooting step, or when the phone is restarted. Actually, it is clearly a coding or hardware issue that Samsung has not figured out how to fix it. First step is to simply restart the phone.

This step is very effective to resolve minor firmware issues.

  • Press and hold the Volume Down button.
  • While holding down the volume button, press and hold the Power key.
  • Hold both keys together for some seconds until the Galaxy A20 logo shows on the screen.
  • When the device finished rebooting, reconnect to the network and check if it still keeps disconnecting because if it still does, try the next solution.

2- Reseat SIM card to fix No 4G LTE signal

Another way to detect 4G LTE is by disconnecting its SIM card temporarily. By resetting the SIM card, the system will attempt to put in new network configuration, which can help in resolving minor bugs. Turn the device OFF first before removing the SIM card. Do the same before the card is re-inserted.

Sometimes, network issues occur if the SIM card is not properly inserted in the tray, or if it’s not making good contact with the board. To fix the problem,

  • Turn OFF the device.
  • Remove the SIM card tray.
  • After 5 seconds, reinsert the SIM card. Make sure that the card is fit in the slot.
  • Afterthat, turn the phone ON and observe what happen.

3-Check if Network is working to fix No 4G LTE signal on Galaxy S10 

This error may arises because if the network mode is down or having a problem. To check it, use another compatible phone which can work with the same network before also it should be LTE capable.
Insert your SIM card to it and see if it’s showing 4G LTE or not.
If 4G network mode is working in normal condition, it means that there’s a problem with Samsung Galaxy S10.
If 4G network mode is not working in normal condition, then get help from your network operator.

4: Manually select 4G LTE network

Sometime manually change in 4G LTE to fix this problem. Follow these steps to manually force the device to use 4G LTE:

  • Open “Settings app”.
  • Tap “Connections”.
  • Select “Mobile networks”.
  • Tap “Network mode”.
  • Select the one that indicates 4G or similar to this: LTE/3G/2G (auto-connect).
  • Restart the device and check for the problem.

5-Reset Network Settings to troubleshoot network issue on Galaxy S10


Apps which require constant internet connection to work like Gmail will not function properly if affected by incorrect network settings. 

A bug in the device’s network configuration is also a reason of this problem. Make sure to include Reset Network Settings in troubleshooting list. 

To ensure that Galaxy S10’s network settings are correct, reset it now. Follow the steps below:

  • On the Home Screen tap on an empty space until the Apps tray pops up.
  • Go to Settings.
  • Select General Management.
  • Tap Reset.
  • Select Reset network settings.
  • If you have set up a PIN, enter it.
  • Confirm the selection.
    Once complete a confirmation window will appear.

6- Wipe cache partition to fix No 4G LTE signal on Galaxy S10 

Android depends on a set of temporary files called system Cache to load apps quickly. If this Cache becomes corrupted or outdated, the device can lag, freeze, or show signs of slow performance. Sometimes, unusual glitches may occur as well as overall performance of the system may be affected. To ensure that your S10 has good system Cache, it is better to clear it once every few months. Here’s how to do it:

Follow the steps below:

  • Turn Off the phone.
  • Press Power button, Home and Volume up button together and hold for about 5-7 seconds.
  • When the Samsung logo appears, release the Power button only but continue hold the Home and Volume Up Keys. 
  • Recovery screen appears in which a list of options are given.Scroll down with the help op Volume Down key and select “Wipe Cache partition” using the Power button

This picture shows the Wipe Cache partition option appear on the screen to fix No 4G LTE signal on Galaxy S10 | troubleshoot network issue on Galaxy S10

  • Using the Volume Down button, highlight the option “yes”. Select “yes” by pressing Power button.
  •  Your phone will start wiping cache partition.As the process of wiping cache  is complete, highlight “Reboot System Now” using Volume key.

              This picture shows Reboot system now option to fix No 4G LTE signal on Galaxy S10 | troubleshoot network issue on Galaxy S10

  • Press Power button to start reboot. The device will now reboot longer than usual.

If the device get stuck during Reboot, it means this step fail to fix the error of Samsung Galaxy S7 Edge.

7- Install carrier updates

to fix No 4G LTE signal on Galaxy S10 | troubleshoot network issue on Galaxy S10


New network errors are discovered by the time. So network operators should release the solutions to fix them. These solutions are sometimes associated with system updates. In case the cause of the error is known by network operator and they’ve already created a solution to fix the problem. Then try to install updates. There are usually two types of updates that you can install:

  1. App updates 
  2. Android or system updates.
  3. In some instances, a third type of update may be released by network operator to address a unique bug which appears in their system. Make sure to install them to fix troubles or to prevent new bugs from developing. Network updates released in the same way as Android updates. So, it is better to allow the installation once it shows up in the status bar.

8- Check for bad third party app

If the No 4G LTE signal issue occured right after you installed an app, the next troubleshooting step that you can do is to delete that app. This can sometimes happen if a new app is poorly coded and negatively impacts the Operating System or other apps. If you are not sure whether or not an app is to blame, you can restart the device to safe mode and check. In this mode, all third party apps will be blocked, allowing only pre-installed ones to run. So, if 4G LTE works normally on safe mode but not when you switch back to regular mode, that means an app is to blame. To boot the device to safe mode:

  1. Press and hold the Power button until the Power off window appears then release.
  2. Touch and hold Power off until the Safe mode prompt appears then release.
  3. To confirm, tap Safe mode.
  4. The process may take up to 30 seconds to complete.
  5. Upon reboot, “Safe mode” appears in the lower-left of the home screen.

Remember that third-party applications are disabled in this mode so what you can use are pre-installed apps. If the issue won’t appear on safe mode, that means that the problem is due to a bad app. Uninstall the app you recently installed and see if that will fix it. If the problem remains, use the process of elimination to identify the rogue app. Here’s how:

  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 S10 is still problematic, repeat steps 1-4.

9- Factory reset


For this wipe the device and return all its software settings to defaults. Factory reset is usually effective in fixing software-related issues. Most probably the issue is a bad software or app, Factory Reset is a good step to fix it.
Below are the two ways to Factory Reset Galaxy S10:
Method 1: How to hard reset on Samsung Galaxy S10 via Settings Menu
This is the easiest way to wipe Galaxy S10. Follow the steps below, if the user has no problem to go in settings.

  • Create a backup of your personal data and remove your Google account.
  • Open Settings app.
  • Scroll to and tap General management.
  • Tap Reset.
  • Select Factory data reset from the given options.
  • Read the information then tap Reset to continue.
  • Tap Delete All to confirm action.
    Method 2: How to hard reset on Samsung Galaxy S10 using hardware buttons
    If  the device is not booting up, or it boots but Settings menu is inaccessible, this method can be helpful.
  • First, boot the device to Recovery Mode. Once you successfully enter Recovery Mode, then start Master Reset procedure. 
  • If possible, create a backup of your personal data ahead of time. If your problem prevents you from doing that, then simply skip this step.
  • Also, remove your Google account. If the problem prevents you from doing that, then simply skip this step.
  • Turn off the device. This is important. If you can’t turn it off, you’ll never be able to boot to Recovery Mode. If you are not able to shut the device off regularly via the Power button, wait until the phone’s battery is drained. Then, charge the phone for 30 minutes before booting to Recovery Mode.
  • Press and hold the Volume Up button and the Bixby button at the same time.
  • Continue holding the Volume Up and Bixby keys, press and hold the Power button.
  • The Recovery screen menu will now appear. When you see this, release the buttons.
  • Use the Volume Down button until you are highlighting ‘Wipe data/factory reset.’
  • Press the Power button to select ‘Wipe data/factory reset.’
  • Use Volume Down to highlight Yes.
  • Press the Power button to confirm factory reset.

10- Contact network operator

If the problem is caused by software or in one of the apps, then Factory Reset will resolve the issue. However, if No 4G LTE signal still exist after Factory Reset, it means that the problem is outside the device. So, visit your network operator, or contact them via their help line to fix the error.

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