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How To Fix Invalid SIM Card On Android or iPhone

One of my cousins brought a new phone when everything was set to use the phone then he gets message of invalid sim card. But why does it happen? Does anyone know the reason behind this mystery? I bet you don’t know that is why you have clicked on this article. So, before you die from curiosity, I have created few tips on how you can fix your invalid Sim card status in both android and iPhone.

So, by the end of this article you will become a pro in how you can solve your invalid sim card issues handily.

Before we begin with our article one thing you need to know is that Fixing invalid sim card problem is not a big deal and it can happen with everyone once in a while.

Some of the reason behind this hiccup is that maybe you have not inserted the sim card correctly or maybe your sim card has not been activating. That means your SIM card is not detecting your phone device and you couldn’t connect with the network and many more.

We will be covering all the snag in detail and along with that we will also be providing the relevant solution for the same. Make sure you are reading till the end so that you do not miss anything.

Without beating around the bush let us get started with this one.

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Software errors are also caused by invalid SIM cards like your Android and iPhone device are outdated or have misbehaving apps.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 invalid SIM card on Android and iOS devices with some possible solutions. Here you get a list with details of all the methods that are likely to work on Android and iPhone devices.

1. Restart your device

restart the phone

A device restart is a great way to fix software errors or bugs, or SIM card errors. Just click restart to turn it back on and the issue will probably be resolved. Remove bugs from your device and perform its functions correctly.

Rebooting clears the temporary storage of RAM and data. This will keep your device in like-new condition. Stop running apps, delete corrupted files, and then restart.

To restart your Android device:

  • Press and hold the power button
  • Select the restart option instead of shutting down and powering on.

To restart your iPhone device:

  • Press and hold the Volume Down or Top button.
  • Drag the slider to turn it off.
  • After waiting, you may turn on the device by pressing the side button until the Apple logo appears.

2. Switch Correct Network Operator

network operator

Your SIM card may not be read by your device due to an unsupported carrier. Make sure you are connected to a network supported by your device and his SIM card.

Follow the steps below to select the correct carrier on your Android device.

network operator option
  • Go to the Settings menu.
  • Tap Connections, then tap Cellular.
  • Tap Career. Find the Network option and tap Select Manually.
  • Select the correct network from the list.

How to select a network on iPhone:

  • Open Settings from the menu.
  • Tap Cellular.
  • From the given options, tap Cellular.
  • Drag to the left to activate the automatic slider. This will search for available networks at that time and disable automatic network search.
  • Select the correct network from the list when it appears.

3. Reinsert the SIM

reinsert the sim card

This is a common way to troubleshoot connectivity issues such as Invalid SIM card errors.

Note: Resetting your network will only restore your Wi-Fi, cellular, and VPN networks to their default state.

To reset the network on your Android phone:

  • Open Settings and tap General Management.
  • Tap Reset, then tap Reset Network Settings.
  • You can also do it another way. Under Settings, tap System.
  • Select Details. Tap Reset options and select Reset Wi-Fi, mobile & Bluetooth.

How to reset network on iPhone:

  • Turn off iCloud Keychain first so you don’t lose the passcodes for all your iCloud-enrolled devices.
  • Go to the Settings menu. Tap General, then tap Reset.
  • There you will find some reset options.
  • Select Reset network settings when prompted for passcode, enter your passcode, and wait for the restart process to complete.
  • For more information, check out our detailed guide on how to reset network settings on your iPhone.

4. Reset Network

reset the network setting

This is a common method for resolving connectivity issues, such as invalid SIM card errors.

Note:
Resetting your network will only restore your Wi-Fi, cellular, and VPN networks to their default state.

How to reset the network on your Android phone:

  • Open Settings and tap General Management.
  • Tap Reset, then tap Reset Network Settings.
  • You can do it another way. Under Settings, tap System. Select Details. Tap Reset options and select Reset Wi-Fi, Mobile & Bluetooth.

How to reset network on iPhone:

  • First, turn off iCloud Keychain so you don’t lose the passcodes for all your iCloud-enrolled devices.
  • Go to the Settings menu. Tap General, then tap Reset. There you will find some reset options.
  • Select Reset network settings when prompted for passcode, enter your passcode, and wait for the restart process to complete.
  • For more information, check out our detailed guide on how to reset network settings on your iPhone.
  • For more details, follow this detailed guide on how to reset the network settings on iPhone

5. Try Airplane mode On or Off

airplane mode

The plane will either turn off your cellular network or take you away and pick up your signal again. This mode helps conserve the power used to search for the signal.

Power on the aircraft first, wait a few seconds, then turn off this mode.

Search for cellular networks and update networks. So the device searches for networks supported by his 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 of the home screen.
  • Tap on the Airplane icon and wait for a few seconds.
  • Turn off your Airplane mode.

6. Activate safe mode

turn on safe mode

Third-party apps stop running when safe mode is enabled. This can also help resolve invalid SIM card issues.

Enable Safe Mode on your Android phone.

  • Press and hold the power button.
  • Press and hold the power off icon when it appears.
  • A Safe Mode icon will be available soon. Tap it to restart your device in safe mode.
  • If you want to turn off safe mode, restart your device.

Enable Safe Mode on your iPhone.

  • Press and hold the power button.
  • Repeat this step one more time to power on the device.
  • When the light comes on, press and hold the power button and volume down button at the same time until the Apple icon appears.
  • Safe Mode will be automatically enabled.
  • If you want to disable it, reboot your device.

7. Update your Software

software mode

Updating your software gives you access to the latest features. It will help you fix the error or crash that caused the invalid SIM card error.

A sufficiently fast internet is required to update the latest software for your device.

Update your Android phone’s software.

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

Update the software on your iPhone:

  • Open the Settings menu and tap General.
  • Tap Software Update.
  • On your iPhone, tap the Download and Install button.
  • Tap Install to apply the update.

8. Reset factory settings

turn on the factory reset

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 isn’t working properly, or if your phone doesn’t recognize your SIM card, there may be a problem with your phone.

Please contact customer service to correct the error. Visit your device provider’s official website for support.

It will guide you through the supported networks and SIM cards and fix the troubleshooter. If the problem is serious, you can contact the nearest service center.

10. Buy a new SIM card

Have you tried all the solution, yet nothing fixes your SIM card issues the buy a new SIM card on the same phone number this way you do not have to remember your new number at least.

What are the SIM card maintenance tips?

After fixing the problem, your SIM card is fine, but you also need to protect your SIM card from failure or damage. Here are some tips for maintaining your SIM card properly.

Don’t touch the chip

Always avoid chip or gold contact as it contains data. If you touch it, sweaty hands or moisture from your hands will corrode it, which can have a big impact.

Avoid frequent changes

Do not replace the SIM card as it may damage the SIM card.

To remove the SIM card slot, always use an ejector tool and gently insert the SIM card into the tray.

We recommend that you keep multiple SIM cards for each phone device so that you don’t have to switch frequently. Do not cut the SIM card yourself

Do not cut the SIM card yourself to make it shorter or smaller. It is very difficult to cut and must be made in nano size with proper tools.

Cutting the SIM card yourself can permanently damage the SIM card. Take it to a mobile shop and cut it with a suitable tool or machine.

Keep it safe

If you’re not currently using your SIM card or have changed your SIM card for a while, keep it safe.

If you don’t use your phone for a long time and have a SIM card, remove it from your device.

Keep SIM cards away from liquids, extreme temperatures and magnets.

Fluids and high heat from rust, strong magnets will affect the data on the chip.

Clean up carefully

Clean your SIM card carefully and properly. Place the SIM card on a clean, dry and clean surface.

Blow off dust and wipe gently with a soft cloth or cotton ball.

Do not rub the SIM card against your clothing or touch it with wet or dirty hands.

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Final Thoughts:

All of the above methods will either fix the issue or fix the problem with your device. If these solutions are not effective, the SIM card should be replaced.

There can be so many scratches that cause failures and clutches.

Check by inserting his other SIM card into the phone. If this works, your SIM card is damaged.

Easily prevent your SIM card from being patched and keep your software safe. I’m sure you won’t have to deal with it anymore.

Until then, keep reading to know more!

FAQs

Can I use my phone without SIM card?

Yes, you can. A lot of features can be use through Wi-Fi but if you are going out and new to send SMS and make a call then you need SIM card for it.

Are documents required for buying a SIM card?

Yes. Documents that prove your age and nationality are required.

Does it take a long time for SIM to activate?

Yes, either your SIM would start immediately or maybe it would take around 6 to 1 day to start your respective SIM card.

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