A SIM card that doesn't work can cause a lot of problems. Here's how to fix the "No SIM card" error on your Android phone.

No SIM card detected fix #6: Check for bad apps Sometimes, a third party app may cause problems or interfere with the Operating System.

Press the Power button to confirm factory reset. Galaxy Tab A SIM card not detected fix #9: Repair We can’t always eliminate the chance that bad hardware is causing the problem.

A No Sim Card issue is caused when your phone either fails to recognize the Sim card or can’t read any information it contains.

If your phone suddenly won't recognize your SIM card, don't panic. There are a few things you can do to try and resolve the problem. Here's what to do.

These are proven fixes you can use if you’re looking to resolve the “No SIM card detected” or “No SIM card installed” issue on your iPhone or Android smartphone.

Before you can activate your SIM, you need to know which type of SIM your device supports, allowing you to choose between an eSIM or a physical SIM card. Here's how to check this out on Android or ...

Need to access your Android device's SIM tray but can't find the ejector tool that came in the box? All hope is not lost. There are a few things you can try.

And that's it, you've inserted your SIM card/s into your Galaxy S21. Don’t forget to check our other guides on how to make the most of your Galaxy S21 here.