12 Methods To Fix “Invalid SIM Card” Error on Android

How To Fix Inavalid SIM Card Error On Android

Find Top 12 Methods To Fix “Invalid SIM Card” Error On Android Smartphone!

Summary: Have you get the error message saying “Invalid SIM card – Network locked SIM card inserted”, “Activation not completed: Select to retry activation process – Inavalid SIM card“, “Invalid SIM card inserted – The SIM card is not supported“, “No SIM card – Insert SIM card” or “SIM card not detected” on your Android phone. I know how irritating this is when you know that you have inserted the SIM card on your device but still you are receiving the error message “Invalid SIM card” on your phone. But, you don’t need to worry, here are 12 easy methods on how to fix “Invalid SIM card” error on Android phone.

What Is The Meaning Of “Invalid SIM”?

Invalid SIM card error means that your device does not have any SIM card or the connection your phone is not good or the SIM card is not properly placed in its slot/lose. No matter why you are receiving this message as there is some connection between SIM card and its tray.

Now, let us look at a practical example.

Practical Example: A User Getting Invalid SIM Card On Android

“How do I fix an invalid SIM card?

My husband’s phone won’t even get any service. He’s not very happy he spent $50 and he can’t even make a call.”

Original Post Taken From: Androidcentral

There are lots of users who are also facing this invalid SIM card issue on their Android phone.

So,  why does my SIM card keep saying invalid? Well, let’s know what are the possible causes behind it.

Additional Reading: Fix “Unfortunately, Phone Has Stopped” On Android

Why Does My SIM Card Keep Saying Invalid?

  • Might be your SIM card is not active.
  • If your phone is damaged then it can also cause an “Invalid SIM card” error.
  • Due to a damaged SIM card tray.
  • Defective SIM card.
  • Bad applications can also result in this issue.
  • Due to a poor network connection.
  • Having some problems in the account of your network carrier.
  • Software bugs can also cause an invalid SIM card issue.

So, if your phone says no SIM card on Android then don’t worry, below I have discussed 12 easy methods to fix invalid SIM card error on Android.

Method 1: Restart Your Android Device

The easiest method to fix an invalid SIM card on Android is by restarting your Android phone. Restarting your device removes all bugs from your device and fix small errors. So, you should also restart your device to connect to the network again and then check the error is solved or not.

Restart or Reboot Your Android Phone

Additional Reading: [Quick Tips] How To Unlock Android SIM Card

Method 2: Re-insert SIM Card On Your Android Phone

If your SIM card is lose on your phone SIM card tray or having a faulty connection then you should power off your device and put out the battery. Now, take out your SIM card and then again put it back and check “Invalid SIM card” error is solved or not.

Method 3: Check SIM Card Tray

If your SIM card tray is damaged then this can also cause “Invalid SIM card” error on Android phone. So, you should also check that is your SIM card tray is damaged or not. If it is damaged then you can adjust it by using a piece of foam. To do this remove the device’s back cover and put the foam into the tray and then put the SIM and back cover at the same place.

Check SIM Card tray To Fix Inavlid SIM Card Error On Android

Method 4: Insert Valid SIM Card On Your Android Device

If your SIM card is not valid then it will create the problem and stop to detect SIM card on your device. So, you should switch off your phone and then look if there is any error with the SIM card. But it is good to insert a valid SIM card and then see all is good or not. With the help of this, you can identify either the problem is with the SIM card or with its tray.

Additional Reading: Contacts Disappeared On Samsung Phone? Here How To Recover!

Method 5: Toggle Airplane Mode

If your SIM card is OK then you should toggle your phone in Airplane Mode. You need to just keep your phone in airplane mode for a few seconds and then turn it off and then see “Invalid SIM card” error is solved to not.

Follow the below steps to put your phone in airplane mode.

Step 1: Scroll down the notification panel from your device.

Step 2: After that search for Airplane Mode icon.

Step 3: Then toggle to turn on.

Airplane Mode On Android

Step 4: Now, a warning message will appear on the screen, you need to hit on that message.

Step 5: You need to wait for 30 seconds and then toggle again to turn off Airplane mode.

Once the changing process gets completed, your device will again look for a network, and if your device detects a SIM card the SIM card issue will be fixed.

Method 6: Choose Right Network Operator

If the network operator selected on your phone is different from the phone’s settings then you can receive “Invalid SIM card” error on Android phone.

So, to fix this issue follow the below steps.

Step 1: Open “Settings” and then tap on “More Networks”.

Step 2: After that tap on “Mobile Network” and then on “Network Operator”.

Step 3: Finally hit on “Search Networks”.

Select Correct Network Operator

After completing the above steps your phone will search for networks and when the searching process gets completed then a carrier list will display on the device’s screen. You need to tap on your carrier this will ensure that your phone is properly connected.

Additional Reading: How Do I Unlock My Android Phone If I Forgot My PIN?

Method 7: Clear Cache Of Your Android Device

Clearing cache from your device can help you to resolve the “Invalid SIM card” error.

To clear the app’s cache you need to follow the below steps.

Step 1: Open “Settings” on your phone.

Step 2: Then tap on “Storage” and then on “Internal Storage”.

Step 3: After that tap on the “Cached data” option.

Clear Cache of Your Android Device

Once this process gets completed you will get a popup message saying that this will clear cache from all apps installed on your device. You need to tap on “Delete” button to clear all app’s cache.

Method 8: Set Network Mode To Auto

If your device has selected the wrong network mode then this can also cause your phone to say invalid SIM card on Android phone. And here your device fails to choose the correct network. So, to fix this invalid SIM card error on Android phone you need to set your network mode to auto.

Follow the below steps to set the network mode to auto.

Step 1: Open Settings and then under connections find more networks and tap on it.

Step 2: Next tap on “Mobile Networks” and then tap on “Network Mode”.

Step 3: Now a popup screen will appear with different options.

Step 4: But from there you have to select “LTE/WCDMA/GSM (auto connect)” which you will find at the first option.

Set Network Mode To Auto

Additional Reading: How To Fix “Unfortunately, Facebook Has Stopped” On Android In 2020

Method 9: Enter Your Android Phone In Safe Mode

Every user installs apps on their phone but sometimes they don’t know that the apps which they have installed contain bugs and that’s why you can receive error “Invalid SIM card” or “No SIM Card” on your Android phone.

So, you can put your Android phone is a safe mode to check if there is some conflict in your installed apps. Safe mode helps to stop working any third-party apps and if this does not show an invalid SIM card error on Android then you should check the apps which contain bugs and uninstall those apps to fix an invalid SIM card error on Android.

Follow the below steps to enter in safe mode.

Step 1: Press and hold your device’s Power button until you see the popup screen to turn off your phone.

Step 2: Then tap and hold the Power OFF button until your device confirms from you to enter in safe mode.

Step 3: Finally, tap on OK button to put your device in safe mode.

How To Enter Safe Mode on Android

Now, see if your SIM card is detected and working fine on your device or not. If your SIM card works properly then you should find and uninstall the app that you have recently installed to fix the issue.

Method 10: Factory Reset Your Android Device

If the above methods are not helping you to fix “Invalid SIM card” error on Android then you should factory reset your phone. Make sure you have created a backup of all your device’s data as factory reset will wipe all data from your Android phone.

Here, follow the steps to factory reset your Android phone.

Step 1: Open “Settings” app and go to System and then choose “Reset” option.

Factory Reset Android Phone

Step 2: Now, find “Erase All data (Factory reset)” option and tap on it.

How To Factory Reset Android

Step 3: Then tap on “Reset phone” option to confirm the process.

Once the factory reset process gets completed your phone will restart and now you can set your phone from the beginning.

Note: If your phone’s data have deleted then you are highly recommended to use Android Data Recovery software to get them back to your Android phone.

Additional Reading: How To Recover Deleted Or Lost Photos From Android Phone

Method 11: Buy A New SIM Card

If after reconnecting your device SIM card, you are getting the same error then you should check that if your SIM card is damaged or not.

To properly check this you can purchase a new SIM card and then insert it on your Android device and check your phone is detecting the new SIM card or not.

If a new SIM card gets detected then it is clear that your older SIM is damaged. So, now you should use the new SIM card. But if the new SIM also not get deleted then there is some problem with your device.

Method 12: Contact Your Device Carrier

If the problem with the SIM card is not solved after resetting your Android phone then you can say that this is happening due to hardware problems. So, you should contact your device carrier and they will repair your smartphone.

If your phone is in warranty period then you can exchange your phone and get a new one without that problem.


I hope the methods which I have discussed were helpful for you to fix “Invalid SIM card” on Android phone. So, in the future, if you come across this problem then you can easily handle it from the above 12 methods.

While doing factory reset if you lose data from your Android phone then you are advised to try Android Data Recovery software to retrieve deleted/erased data from your Android phone.