How to Fix an Invalid Sim Card: Most Common Solutions for This Problem?

Updated: September 19, 2022

Can you imagine that to contact a friend, you will need to send a letter by mail or a telegram? Now such methods of communication are not very popular. Everyone has a mobile phone (Android or iPhone) to contact someone in 2-3 minutes. “Why does my phone say “Invalid Sim?” Our experts receive such messages quite often.

People panic and do not know how to solve the problem because they are essentially left without communication. Of course, it is scary, but do not despair. You can quickly resolve the situation yourself. But for this, you need to know the “invalid Sim” meaning, why it appeared, and how to fix it. You do not need to google each question separately, and all the answers are in our article.

What Does It Mean When Your Phone Says “Invalid Sim”?

We want to immediately clarify that the occurrence of this problem does not affect other functions of your phone in any way. You can still take photos, scroll through the Instagram feed, read the news, etc. However, you cannot make calls. So what does an invalid Sim card mean? It simply means that your phone does not have a Sim card inserted, it is not recognized by the system, or there is no connection. This problem will not go away, and you will need to take specific steps, which we will discuss later.

Is There Any Difference Between Invalid Sim Card on Android and iPhone?

Indeed, the operating systems on Android and iPhone are different, and each of them has a number of its own features. However, this problem can occur regardless of your smartphone. The reasons and ways to resolve it are identical. Therefore, whether you have Samsung or iPhone 13 Pro Max, the action algorithm will be the same.

Why Is My Sim Card Invalid: Common Causes?

This problem is impossible to predict. You will only know about it when your phone displays a similar message, “The Sim card with the information you provided currently has an invalid status.” 

There are many reasons why this might happen.

  • Problems with the Sim card itself. For example, the microcircuit is damaged, or you incorrectly inserted it into the phone slot.
  • Hardware problems. For example, the Sim card reader component is defective.
  • Software errors. For example, you have not updated your gadget, and it has an old version of the system or complex applications.
  • The network does not unlock the phone. Because of this, it may not work with other Sim card providers.

Unfortunately, the exact cause in your case will not be discoverable until you fix it. However, all methods are safe and will not make your device worse.

How Do You Fix an Invalid Sim Card on Android or iPhone?

You can do the steps described below in any order because this is not a sequential guide. All steps are safe and aimed at fixing an invalid Sim card, not making it worse. You can rely on us and our experience.

Solution #1: Try to Restart a Phone

Restart a Phone

The easiest way that immediately comes to mind is to restart your phone. It is effortless action. Most phone models have a lock button you should hold for a few seconds. If yours don’t have this button, google how to restart your device or ask Howly experts to assist you. Once you’ve done this, the screen will display several options. Select “Restart.” Once your phone reboots, check if the problem persists. If not, let’s move one to other possible solutions.

Solution #2: Try to Restart Invalid Sim Card

It is quite possible that, for some reason, the Sim card is not inserted correctly. In the first solution, as described above, you press a specific phone button. Please do it again. But select “Power off” at this time. If your Sim card is under the battery, pull it out and remove the Sim card and install it.

Restart Invalid Sim Card

If it is on the slot’s side, follow the same steps, but without removing the battery. Turn on the phone. Is the phone saying “Invalid Sim” after that? Then it’s not your solution.

Solution #3: Check Another Sim Card on Your Phone

If you have the opportunity to check a different Sim card, be sure to do it. If your phone is reading it, there may be a problem with your Sim card. Try to check it on another phone. If it knocks out the error, you’d better buy a new Sim card since the problem is in it. Probably, it has been damaged. However, sometimes it happens that both tests were successful. Then why does the “Sim card not valid” notification appears on your phone only with this Sim card, and how to fix it? In such a case, it would be a more efficient result to seek professional help.

Solution #4: Check and Clean Your Sim Card Tray

Perhaps you need to clear the cache (unuseful memory) on your phone to fix the problem. On all phones, it is virtually identical to the process. 

  • For Android: Settings – Storage – Internal Storage – Cached Data.
  • For iPhone: Settings – General – Storage.

Then, in both cases, press the Delete button. Usually, the Sim card malfunction is immediately eliminated. However, note that you may need to restart your phone again. If it does not work, let’s find another idea on how to fix an invalid Sim card on Android or iPhone.

Solution #5: Try to Turn Off an Airplane Mode

According to statistics, in 55% of cases, this is the way to eliminate the arisen bugs. Try to turn on and off Airplane mode. For this, you need:

  • Swipe your finger from top to bottom on the screen.
  • Select from the menu to display the icon display plane.
  • Turn mode for at least 30 seconds.
  • Turn off airplane mode and wait until your phone finds an available network.

If the problem persists and the “Google Fi – Invalid card” or another similar message continues to appear, proceed to the next step.

Solution #6: Check and Choose the Correct Network Operator

Choose the Correct Network Operator

Your phone may fail, or you can select an inappropriate network operator. Therefore, you need to fix an invalid Sim card with the following steps:

  • Go to the Settings of your phone.
  • Select Mobile networks. In this menu, you’ll see data roaming, network mode, etc.
  • You need to select a network operator.
  • Search for the network you need.

After the search is complete, you will receive a list from which to choose your network.

Solution #7: Set Chosen Network Mode to Auto

Another way to fix an invalid Sim card on Android is to change the network mode. If you have a manual, change it to automatic. It is not difficult to do this. In the Settings in the Mobile networks menu, go to Network mode and select the first option that pops up. Usually, it is LTE/WCDMA/GSM. If the problem is not resolved immediately, wait a while or restart your phone again. If the problem persists, move on to another solution.

Solution #8: Reset Your Network Settings

Your phone saying “Invalid Sim”, you don’t know what to do else? You can reset settings. It also helps with other network problems. The procedure with various phones is slightly different. For example, on Android, you need to find General management in Settings and hit Reset – Reset network settings. Then confirm your decision. Some phone models have an alternative reset option in the Advanced menu.

Reset Your Network Settings

If you have an iPhone, you will first need to disable iCloud Keychain. You need to:

  • Open Settings;
  • Choose Apple ID profile;
  • Select iCloud;
  • Choose Keychain and disable it. 

Otherwise, you may lose passwords for all devices. Furthermore, the algorithm is the same as that of Android. So, why does it say “Invalid Sim” in this particular case? Problems with networks can be due to using of unsafe connections. 

Solution #9: Activate a Safe Mode on the Phone

Safe mode can help with the error “er05 invalid Sim”. 

On Android, press the power button. When the Disable icon appears, press and hold it. The Safe Mode icon will become available later. Click on it to reboot your device in safe mode. Safe mode can be turned off by Simply restarting the gadget. 

On iOS devices, press and hold the power button to turn it off. Repeat this step to turn on the device. When the screen turns on, press and hold power and volume buttons simultaneously until the Apple icon appears. Safe mode will automatically be enabled. 

If the controls are slightly different depending on the device model, you can quickly check the specific instructions on the mobile device manufacturer’s help site or ask for professional help.

Solution #10: Do a Factory Reset

Do a Factory Reset

When you Google “hidden menu invalid Sim card,” many articles will advise you to do a factory reset. But you can turn to this when no other simple method works. It will delete all information and data in the internal memory, applications, and current settings of your device. The retrieved state is the default state of the widget when it is new. As a precaution, make sure you back up all important information and files to a flash drive or the cloud and fully charge your device. The data will be deleted, and the process can take hours.

But if you are sure that it is the only way to save your phone, follow the next steps:

  • Open Settings;
  • Choose General management;
  • Select Reset;
  • And activate factory data reset.

If you have an iPhone, it can be done even in free steps. After you open Settings, choose General–Transfer or Reset iPhone. Now your phone is like a new one, and the problem is solved. 

Solution #11 Contact Reliable Support 

Invalid Sim means some severe problems with your phone, especially if any of the described methods can’t fix it. A reliable company with experienced and certified employees will be able to sort out the problem much faster. And they will tell you right away what you need to do. You can also contact your light operator. However, they usually do not understand the problem in more detail and immediately advise replacing the SIM card with a new one. But what if the problem arises later with a new one? Constantly changing them is not an option. Therefore, always try to look deep into the issue and not be satisfied with too simple solutions.


Wrapping Up 

So, what is an invalid Sim? It is an incorrect operation of the sim or phone itself. You can’t make any calls or text messages, and it is a real problem in the 21st century. It is not necessary to fix this issue on your own. You can always delegate it to certified Howly specialists who can solve it quickly and efficiently. Guides on the Internet are great options, but the industry doesn’t standstill. So you might have a phone model that’s newer than it was when someone wrote the step-by-step instructions. With a personal Howly consultant, such problems will not arise because you will be prompted with an algorithm specifically for your model.

Trusted & Secured