How to fix an Invalid Sim Card on an Android phone

There are some actions you can take to fix the Invalid SIM card error message on your Android device.

This article will demonstrate how to fix an Android device with an invalid SIM card.

Potential reasons

  • Your phone lacks a SIM card.
  • Your phone’s connection is too unsteady.
  • The SIM card is misplaced or not in the right slot.
  •  Due to a link between SIM cards and their tray, you are receiving this notification.

If your SIM card is giving you trouble, try first restarting your phone by removing the battery, waiting ten seconds, and then replacing it. If that doesn’t resolve the issue, follow these instructions to fix the Android invalid SIM card.

Steps to Take to Fix an Invalid SIM Card on an Android phone

You can attempt a few different things to try to fix an invalid SIM card on Android.

Check SIM card status

If it’s only a glitch, then this might resolve the problem. If it doesn’t work, check that your SIM card is active in your phone’s settings.

If it doesn’t resolve the issue, you might need to take your SIM card to a shop or carrier so they can investigate it.

Did you get the smartphone from another state?

Several smartphone makers include a region lock. This is a very typical occurrence with Samsung phones since it prohibits their handsets from being purchased for a bargain in a developing nation and sold for a premium in a developed nation.

This indicates to you that it will only accept SIM cards from service providers in that nation. If you need to remove the lock immediately, you can do so at specialized mobile repair shops. Of course, for a cost.

Turn on and out of Airplane Mode

Try this simple repair on iOS and Android. From the quick-access taskbar, activate Airplane Mode. Give it between 30 and 60 seconds, then turn it off once more. The network will be reset as a result, forcing a reconnect. You need it specifically to correct the SIM card’s access.

Restart your smartphone

The problem with the invalid SIM card wasn’t solved? Why not try one of the most popular techniques to mend electronics — switch it off, then back on? Even though it might feel ridiculous, it’s worth a shot if it helps and protects you from having to take further measures.

Reinstall your SIM card

The issue is still present after a phone restart? It’s essential to withdraw the SIM card and then reinsert it (read this guide on an iPhone). Additionally, this ensures that the SIM card wasn’t inserted wrongly the first time. Try some other slot if your smartphone has dual SIM capability. Remember in the sense that it must match snugly. There are two logical results from this.

  • The SIM card not functioning issue has been resolved. Congratulations!
  • The inaccuracy remains the same or has been “updated” to add a justification. For instance, we have run into errors like “Invalid SIM card. many periods, or “Network locked SIM card inserted.”

Consider this if the error remains unchanged. Did you observe any damage, such as large cracks or a missing component, to the SIM card tray? The SIM card microchip may move somewhat in the slot as a result of this. If that’s the case, you’ll need to take your smartphone to a repair facility or order a used tray.

Change your SIM card

Want to use a SIM card from a different carrier while having bought the phone from the same carrier? If so, you most likely can’t because your SIM card is network-locked to the carrier. Take your SIM card extractor once more, and then use it to unlock a SIM card slot to see if that is the problem. Get a SIM card from a relative or friend who subscribes to the same carrier as the one you used to purchase the phone.

Change the Prefix Code

Adding a comma to the end of the Prefix code is another method for fixing the Connection Problem or Incorrect MMI Code on an Android phone.

The two methods to change the prefix code are listed below.

  1. Add a comma at the end of the Prefix c is (*2904*7#), for example (*2904*7#,).
  1. In a format like this (*+2904*7#), the + sign can be used after the *.

Switching between Radio and IMS over SMS

Switching between radio and IMS can help.

Enter (*#*#4636#*#*). NOTE: There is no need to push the send button; the service mode will open up immediately.

  • Switch to service mode.
  • Choose from Phone or Device details.
  • Choose Perform Ping test.
  • The Galaxy will reboot after the Turn Radio Off switch has been clicked.
  • Choose reboot.
  • Resolved Android MMI Code Issue

In conclusion, there are several approaches you may use to fix the MMI problem on your smartphone, some of which are a little more complex than others. While MMI faults mostly affect dual-SIM phones, they can also affect single-SIM phones due to weakened signals or tower network problems. Call your supplier for help if the aforementioned fixes don’t help you.

And what If the Issue Continues?

After attempting the aforementioned fixes, then it may be time to contact your provider for assistance if the issues. The agent will require your account details and your device’s IMEI number to troubleshoot the problem, so be prepared with both.

Additional Advice and Techniques

Now that you know how to fix an Android Sim issue, here are a few more tips and tricks to help you:

  • Enter the codes 0000 or 1234 if your smartphone is requesting a SIM unlock code.
  • Ensure your Sim is properly inserted if your smartphone is giving the “No SIM Card” warning, then try restarting it.
  • If the problem persists, try inserting an alternative SIM card into your smartphone to see if that resolves it.

Frequently Asked Questions

How can I fix my Android phone’s invalid SIM card?

Several methods exist for doing this:

  • Change the SIM card: If your smartphone is still covered by warranty, a customer support agent can assist you with replacing the SIM card.
  • Wipe the cache on the phone: This may delete all of your information but may solve the issue.
  • Update the software on your phone: In some cases, a software upgrade is all that is required to resolve an invalid SIM card problem.

You now know how to fix an invalid SIM card on Android Mobile in six different ways. Try the last approach on this list if your phone is requesting a SIM card PIN and you are unsure of what it is. Your only choice might be to take your device to a specialist if that doesn’t work.

Luckily, one of these fixes will work for you, and your phone will be functional once again shortly.

What does “invalid” on your SIM card mean?

You’re not alone if you’re receiving the error message “Invalid SIM Card” on your Android phone. This is a typical situation.

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