How To Fix Invalid SIM Card On Android or iPhone

fix invalid SIM Card on Android and iPhone
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Many users are complaining about invalid SIM card errors. They have tried some solutions but they didn’t work. Here you will get the full guide to fixing invalid SIM Cards on Android and iPhone devices so you can use your phone in a good manner.

Invalid SIM cards may occur anytime. If your software or hardware has any problem then your device will display the invalid SIM card or No SIM card. That means your SIM card is not detecting your phone device and you couldn’t connect with the network.

What is the cause of an invalid SIM Card?

There could be many reasons for an invalid SIM card or SIM error on your Android and iPhone devices. First, it might be a problem with SIM cards, like the SIM may be damaged or not fitted correctly in the SIM slot. It is also possible that there is a hardware issue so your SIM card is not working well.

Software errors are also caused by invalid SIM cards like your Android and iPhone device are outdated or have misbehaving apps. It’s possible that your smartphone may not be network unlocked, that’s why it doesn’t work on other SIM card providers.

These all are minor issues that you can fix on your own. You can discover the exact reason for SIM card error so you should try at least some minor problems. Fixing these problems helps to function your device well.

How to fix invalid SIM Card on Android and iPhone

You can fix your invalid SIM card on Android and iOS devices with some possible solutions. Here you will get the list of all methods with details that probably work on Android and iPhone devices.

1. Restart your device

Restarting your device is a great way to fix any errors or bugs in your software or your SIM card errors. All you need to do is click on the restart and turn it on again and the problem will probably be fixed. It will remove errors from your device and run your functions correctly.

Restarting will clear your RAM and the temporary storage for data. This will take your device to its new state. It stops your running apps and restarts again after removing the corrupted files.

To restart your Android device:

  • Press and hold the power button
  • Select the Restart option instead of shutting down and turning it on.

To restart your iPhone device:

  • Press and hold the volume button or top button.
  • Drag the slider to turn it off.
  • After waiting, sometimes turn on the device by pressing the side button until the Apple logo shows up.

2. Switch Correct Network Operator

It is possible that your SIM card is not readable for your device because of an unsupported network operator. Ensure that you are on the supported network that is supported by the device and SIM card.

Follow the given steps to choose the correct Network Operator on the Android device:

  • Go to the Settings menu.
  • Tap on Connections and then Mobile Networks.
  • Tap on Network Operators.
  • Search the Network option and tap on Select Manually.
  • Now, select the correct network from the list.

To select the network on an iPhone:

  • Open the Settings from the menu.
  • Tap on Cellular.
  • Tap on Cellular from the given options.
  • Drag left to turn on the Automatic slider. This will search for available networks at that moment and disable the auto- searching network.
  • Choose the right network from the list once it is displayed.

3. Reinsert the SIM

Try reinserting If your SIM card is not fixed in the correct way then remove your SIM card carefully and put it back into the SIM slot. This will remove your SIM card errors issue.

  • Power off your device while ejecting your SIM card from your device.
  • Pull the tray and remove the SIM card.
  • Put the SIM card back in the SIM slot and insert the tray into your device.
  • Now, turn on your phone and check if the SIM card is working well or detected.

4. Reset Network

It is a typical method to solve connectivity problems including invalid SIM card errors.

Note: If you reset your network only WiFi, Cellular Network and VPN network will be switched to the default state.

To reset the network on an Android phone:

  • Open the Settings and tap on General Management.
  • Tap on Reset and then tap on Reset Network Settings.

You can do it by another method. Tap on System from the Settings. Choose Advanced. Tap on Reset Options and choose the Reset WiFi, Mobile & Bluetooth option.

To reset the network on iPhone:

  • First, Switch off your iCloud Keychain so you won’t lose your password to all your iCloud registered devices.
  • Go to the Settings menu.
  • Tap on General and then Reset. There you will get several reset options.
  • Select Reset Network Settings, if there they ask for a passcode then type your passcode and wait for the rebooting process to complete.
  • For more details, follow this detailed guide on how to reset the network settings on iPhone

5. Try Airplane mode On or Off

Airplanes turn off your Cellular Network or take you to catch your signal again. This mode helps to save the power that is used to search for signals.

First, turn on your Airplane, and after waiting for a few seconds turn off this mode. It will refresh your network that works to scan for a mobile network. Thus your device checks for the supported network with your SIM card.

To access Airplane mode on an Android phone:

  • Swipe down the notification bar on your home screen.
  • Tap on Airplane mode from all the several icons.
  • Wait for 10 seconds and turn off Airplane mode.

To access Airplane mode on iPhone:

  • Swipe down from the top right corner on the home screen.
  • Tap on the Airplane icon and wait for a few seconds.
  • Turn off your Airplane mode.

6. Activate safe mode

Once the safe mode is on, it will stop the third-party apps from running. This is also a helpful way to solve the invalid SIM card problem.

Activating safe mode on Android phone:

  • Long press the power button.
  • After the power off icon appears, press and hold it.
  • The safe mode icon will be available in a while.
  • Tap on it to restart the device in Safe Mode.
  • If you want to deactivate safe mode then just restart your device.

Activating safe mode on iPhone:

  • Press and hold the power button.
  • Repeat this step again to turn on the device.
  • When the light glows, hold the power and volume buttons at once until the Apple icon is displayed.
  • Safe mode will be enabled automatically.
  • If you want to deactivate it then restart the device.

7. Update your Software

Updating your software will give you access to the latest features. It helps to fix or crash the bugs that have caused the invalid SIM card errors.

You need a good internet speed to update the latest software for your device.

Update the software on Android phones:

  • Open the Settings and tap on Software Update.
  • Select the command Download and Install option.

Update software on iPhone:

  • Open the Settings menu and tap on General.
  • Tap on Software Update.
  • Tap on the Download and Install button on your iPhone.
  • Tap on Install to apply updates.

8. Reset factory settings

Well if all the methods mentioned above don’t work to resolve your problems then resetting your factory settings is the last option that might work.

Resetting the factory settings will delete all your information and data so keep a backup for necessary data. It will take you to the default setting like you start your phone before after removing everything.

Keep fully charged your device because erasing the data and resetting the process will take time almost an hour to finish.

To reset factory settings on an Android phone:

  • Open the Settings app.
  • Go to General Management, if this option is not on your phone then tap on Privacy.
  • Go to the Backup and Reset and tap on it.
  • Tap on Reset or Factory Data Reset.

To reset factory settings on iPhone:

  • Go to the settings.
  • Select General.
  • Tap on Reset.
  • Select Erase All Content and Settings from reset options.

9. Contact Customer Helpline

If your SIM card is new and doesn’t work correctly or detect your phone then probably your phone device is the problem. Contact Customer Service to take help and fix your errors. Go to the official website of your Device provider and take help.

They will guide you with a supported network and SIM card and fix your troubleshooting. They can refer to the nearby service center if the problem is serious.

What are the tips for SIM Card care?

Although your SIM card is running well after troubleshooting your problems you need to prevent your SIM card too from any crashes and damage. Here are a few tips that can help to keep your SIM card well maintained.

Don’t touch the Chip

Always avoid the chip or gold contact because it contains the data. If you touch it, your sweaty hand or moisture of your hand may lead to corrosion that affects badly.

Avoid Frequent Swapping

Don’t swap your SIM card because this can scratch it. Always use the ejector tool to remove the SIM card slot and insert the SIM into the tray carefully.

It is better to keep multiple SIM cards for every phone device so you don’t have to transfer from time to time.

Don’t cut the SIM card on your own

Don’t cut the SIM card by yourself to make it shorter or micro size. It is so hard to make cuts, you should use the right tool to make it Nano size.

If you cut the SIM card on your own then you may damage the SIM card permanently. Bring it to any mobile store to cut using the proper tool or machine.

Store it properly

If you are not using the SIM at the moment or change the SIM card for a while then keep it safe. If you are not using your mobile phone for a long time and there is a SIM card then remove it from your device.

Keep your SIM far from liquid, extreme temperatures, and magnets. Liquid and high heats caused by rusting and strong magnets affect the data on the chip.

Clear carefully

Clean your SIM card carefully and properly. Put the SIM card in a neat, clean, and dry place. Blow the dust and wipe it gently using a smooth cloth or cotton balls.

Don’t rub your SIM on your clothes or don’t touch it with a wet or dirty hand.

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Final Thoughts:

All the above-mentioned methods will fix your problems or troubleshoot your device. If these solutions are not so effective then you need to replace your SIM. There can be so many scratches that are the reason for errors and clutches.

Check other SIM cards by inserting them into the phone if that will work then your SIM card is damaged. Just prevent your SIM from patching and keep your software well. I’m sure you won’t face any further.


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