How to fix a Samsung Galaxy A8 Plus 2019 that keeps showing SIM card not inserted warning (easy steps)

When your Samsung Galaxy A8 Plus 2018 smartphone prompts you with a SIM card not inserted warning, it’s letting you know that it does not detect or unable to recognize the SIM card in it. And it’s a problem that needs to be fixed as the key services such as calling and texting are also affected.

This SIM card warning could be due to a loose, dislodged, or damaged SIM card on the phone. But in most cases, warnings and error prompts like this are usually attributed to software glitches transpiring on the network or phone system itself. Considering that the warning you see on your Samsung A8+ 2018 is attributed to software errors rather than faulty hardware, there are a few things you can try to get rid of the error and get things working properly on your phone again. Highlighted below is a rundown of possible solutions and workarounds you can refer to whenever you need some more inputs in dealing with the same SIM card warning on the same device.

For smartphone owners who found our site while trying to find a solution, try to see if your phone is one of the devices we support. If it is, then visit the troubleshooting page for that device, browse through it to find issues that are similar with yours and feel free to use our solutions and workarounds. However, if you still need our help after that, then fill up our Android issues questionnaire and hit submit to contact us.

First solution: Restart your phone.

Restarting the phone (soft reset) eliminates minor glitches that may cause similar errors to occur at random times. And more importantly, this method works without affecting data and personal information you saved in the internal memory of your device. So you can expect your files to remain intact. A soft reset or restart can be done in two ways, the usual reboot and soft reset using the hardware keys (force restart). The latter is recommended whenever the error makes your phone become unresponsive or frozen.

Here’s how to soft reset your Samsung A8+ 2018 using the hardware keys (force restart:

  • Press and hold the Power button and the Volume Down button simultaneously for about 10 seconds or until your device restarts.

Alternatively, you can do the usual restart procedure with these steps:

  1. Press the Power button for a few seconds or until the phone shuts down.
  2. Then after 30 seconds, press the Power button again to turn the phone back on.

Second solution: Remove and reinstall your SIM card.

Another way to clear minor glitches that might have caused conflict with the SIM card or cellular network system on your phone is by removing and reinstalling the SIM card. It’s also necessary whenever the SIM card is loose or dislodged in the tray. And here’s how it’s done properly:

  1. Insert the ejection pin into the tiny hole to loosen and pop the tray out.
  2. Gently pull out the tray from the tray slot.
  3. Remove the SIM or USIM card from the tray and examine the card for any visible signs of damage like scratches or dents. If everything looks good to you, place the SIM card back into the tray with the gold-contacts facing downwards.
  4. Gently press the SIM or USIM card into the tray to secure it.
  5. Insert the tray back into the tray slot.
  6. Check and ensure that the tray is secured in place and then restart your phone.

Third solution: Update your phone software to the latest version.

Installing the latest update can also be a potential solution especially if the SIM card warning or error is triggered by some bugs or system glitches that could not be remedied by any of the prior methods including soft reset. So if you haven’t done it yet, then you can give it a try this time. Just follow these steps to get started:

  1. Open the Apps screen by swiping up on an empty spot from the Home screen.
  2. Select Settings.
  3. Scroll to and select Software update.
  4. Tap the option to Download updates manually.
  5. Wait for your phone to search for available updates.
  6. If an update is available, follow the onscreen instructions to proceed with the update download and installation.

After successfully installing new update, restart or perform a soft reset on your device to implement the new changes.

Fourth solution: Reset network settings on your phone.

Performing a network settings reset can help deal with network-related errors including those pertaining to SIM card. This can be the key to fixing the SIM card not inserted warning on your Samsung A8+ 2018, especially it started occurring after you modified your phone settings or installing new apps or updates. Some updates may override your current settings automatically. And should this happens, there can only be two possible outputs — either good or bad. To rule this out, you can reset your network settings and reconfigure your phone’s network options back to the way they were before the warning transpires. Here’s how it’s done:

  1. Tap Settings from Home.
  2. Scroll to and tap General Management.
  3. Select Reset from the next options.
  4. Tap Reset Network Settings.
  5. Read and review the information displayed then select Reset Network Settings again.
  6. Tap Reset again to confirm and instigate network settings reset process.

Fifth solution: Back up and reset your Samsung A8+ 2018 to factory defaults.

You may have to consider opting system reset as your last resort if the warning persists after performing all prior procedures. It’s possibly triggered by some tough bugs ruining the network system and so a more advanced solution is required. This however could result to data loss as everything will be wiped out from your phone system in the process. This means creating a backup is necessary beforehand. Should you wish to give it a try, follow these steps to backup and restore and reset your Samsung A8+ 2018:

  1. Open the Apps screen.
  2. Tap Settings.
  3. Go to Cloud and accounts.
  4. Tap the option to Backup and restore.
  5. Enable or disable options to Restore and Back up my data as you would prefer.
  6. Go back to the Settings menu.
  7. Tap General Management.
  8. Tap Reset.
  9. Select Factory data reset from the given options.
  10. Tap Reset device.
  11. If prompted, enter your PIN or password.
  12. Tap Continue.
  13. Then select Delete All to confirm.

Your phone will restart automatically when the reset is finished. After the restart, set up your network manually and see if that fixes the problem. If not, you’ll need to consider other options.

Other options

If you’re still getting a SIM card not inserted warning on your Samsung Galaxy a8+ 2018 after performing all applicable workarounds and potential solutions, then call your carrier or network service provider to report the issue for further assistance and recommendations. Your SIM card might have been damaged and therefore a new SIM card replacement would be necessary.

Alternatively, you can take your phone to a Samsung service center and have it assessed by an authorized technician for any indications of hardware damage. Your phone might have obtained some sort of physical or liquid damage from a previous drop or liquid exposure and that might have damaged the SIM card tray or other relevant components.

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