How to fix No SIM card detected error on Huawei P30

Is your Huawei P30 having trouble detecting the SIM card? In this post, we cover a common problem in a lot of Android phones — No SIM card detected error. This problem can be caused by either software bug or hardware malfunction. To fix this error, check out the solutions that you can try below.

How to fix No SIM card detected error on Huawei P30

No SIM card detected error is one of the common problems for a lot of Android devices. In many cases, software bugs are to blame but there’s also a chance that a hardware malfunction may be the reason. To troubleshoot this problem on your own first, follow our suggestions below.

No SIM card detected fix #1: Force restart the device

In many cases where No SIM card detected error shows up, a restart usually fixes it. At times, leaving the phone running for a long time may allow bugs to develop, resulting to all sorts of troubles. These types of bugs though nearly almost always go away by doing a soft reset. Make sure that you forced restart your phone if none of the suggestions has worked so far. Try to do a forced reboot by pressing and holding the Power key for 10 to 15 seconds. If your phone works, it should reboot and you should feel a vibration and see the Huawei logo. In case you do not feel the vibration and the screen is still blank, then simply press and hold the Power Key for more time until you see the device restart itself.

If nothing changes after attempting to reboot the device a few times, you can abandon this troubleshooting and proceed to the next ones below.

No SIM card detected fix #2: Reseat the SIM

If No SIM card detected error remains after restarting your device, you should follow it up with this step — removing and reinserting the SIM card. Physically taking out the SIM card as a solution can sometimes be effective in fixing all sorts of network troubles. The device is forced to re-configure network settings once it detects a new SIM card. If a bug has developed causing incorrect network settings, reseating the SIM card may help.

Before you remove and re-insert the SIM, it’s important that you turn the device off. This should prevent data corruption.

No SIM card detected fix #3: Wipe cache partition

Should nothing change after a restart and SIM reseat procedure, the next step that you can do is clear the cache partition. Deleting the current system cache should force the device to create a new cache, which may be free of bugs.

In order to load apps quickly, Android stores frequently used items like website links, images, videos, ads, among others in a part in internal storage called cache partition. Sometimes, these items collectively called system cache may get outdated or corrupted causing performance problems or bugs. To ensure that you phone runs efficiently and the cache in top shape, you want to regularly clear the cache partition (about once every few months). When dealing with any app issue, this can also be one of the troubleshooting steps. Here’s how to do it:

  1. With your phone turned off, press and hold both the Volume Up and Power buttons simultaneously for at least 10 seconds.
  2. Let go of the buttons when the Honor logo appears.
  3. Shortly after seeing the logo, the EMUI screen shows up with the recovery mode options.
  4. Press the Volume Down button to scroll to and highlight Wipe cache partition option.
  5. Then press the Power button to confirm selection.
  6. Use the Volume buttons to scroll to and highlight the next options and Power button to confirm selection.

No SIM card detected fix #4: Reset network settings

Network problems like the one you’re experiencing can sometimes be the result of incorrect network settings. This doesn’t mean that you personally made some incorrect changes. Sometimes, an app or update can lead to changes that’s not optimal for other apps or for the Operating System. Bad network configuration may occur for a lot of reasons. What you can do now is to ensure that you return all network settings to their defaults so the system can use them moving forward. To reset all network settings, follow these steps:

  1. Open the Settings app.
  2. Go to Advanced settings.
  3. Scroll to and tap Backup & reset.
  4. Select Network Settings Reset from the given options.
  5. If prompted, read the warning message and then tap Network Settings Reset twice to confirm.

Allow your device to finish resetting network settings and restore the default values. When it’s done resetting network settings, reboot your phone then reconnect to your Wi-Fi network.

No SIM card detected fix #5: Install software update

Software and apps updates usually offer fix patch to obliterate existing problems inflicted by random bugs and malicious software. If you haven’t set your device and/or apps to auto-update, then you will need to manually install pending updates. Here’s how to manually check for software updates on the P30:

  1. Go to Settings.
  2. Tap System.
  3. Select System Update.
  4. Tap the option to Check for Updates.

To check for any pending app updates you’ve downloaded through the Google Play Store app, launch Play Store then navigate to the Updates section. You will then see a list of apps with pending updates. Just tap on Update to install individual app updates or tap Update All to update apps simultaneously.

Don’t forget to reboot/soft reset your P30 after installing updates to ensure all new software changes are properly implemented and to prevent any app from going rogue.

No SIM card detected fix #6: Check for bad apps

Sometimes, a third party app may cause problems or interfere with the Operating System. Having network troubles due to a bad app is not unheard of in Huawei devices. Restart the phone to safe mode and see if that’s the case. In safe mode, no third party app should be able to run. So, if wifi works normally on safe mode, you can bet a bad third party app is to blame. Here’s how to boot it to safe mode:

  1. Power off the device.
  2. Power it back on.
  3. Once you see the Huawei animation on the screen press and hold Volume Down button.
  4. You can see safe mode at the bottom left corner once the device finishes booting.
  5. Now that the device has started on safe mode, charge it and see if there’s a difference.

Don’t forget: safe mode blocks third party apps but it won’t tell you which of them is the real cause. If you think that there’s a rogue third party app in the system, you must identify it. Here’s what you need to do exactly:

  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 Huawei P30 is still problematic, repeat steps 1-4.

No SIM card detected fix #7: Replace the SIM

If the No SIM card detected error continues at this point, your next troubleshooting step would be to take the SIM card out and replace it with a new one. This is highly recommended if you have easy access to your carrier’s store to get a new one. If you can’t readily visit your carrier store to get a new SIM, you can skip this suggestion and proceed to factory reset instead.

No SIM card detected fix #8: Factory reset

Wiping your device may be the next best step for you in this situation. Be sure to create a backup of your personal data before you do a factory reset. Afterwards, follow the steps below to begin the factory reset:

  1. Turn off the mobile by pressing the Power key for a few moments.
  2. Press and hold Volume Up and Power buttons for a couple of seconds.
  3. When Recovery Mode appears let go of all keys​​​​​​.
  4. Now choose “wipe data/factory reset”. Use Volume buttons to navigate and the Power key to accept it.
  5. Confirm the operation by typing in “yes” and select “wipe data/factory reset”.
  6. When you see the Google Verification info confirm the operation by selecting “wipe data/factory reset”.
  7. Finally choose “reboot system now” by using the Power key.

No SIM card detected fix #9: Get help from Huawei

If your Huawei P30 still won’t recognize the SIM or if the error remains after a factory reset, that means that there may be a hardware malfunction behind it. Get your phone examined by Huawei so it can be repaired or replaced.


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