How to fix an unrecognized sim card issue on Samsung Galaxy S21 2

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How to fix an unrecognized sim card issue on Samsung Galaxy S21 2?

Do you often see the sim card icon appear in the header of your phone? Are you unable to send or receive texts and phone calls ? It’s most likely that your Samsung Galaxy S21 2 doesn’t recognize your sim card.

This can be a very inconvenient issue, especially if you use your smartphone on a daily basis.

That is why we decided to help you fix an unrecognized sim card issue on your Samsung Galaxy S21 2.

Limit probable causes Samsung Galaxy S21 2

First, we are going to summarize the most common factors of such an issue.


It is possible that you play games on your phone, but some high paced game application cause excess heat.

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This can prevent your phone from functioning correctly.

To avoid such a situation, try to pause your game from time to time, let your phone rest in a cool spot, and shut down the apps and networks.

Finished subscription contract

Some phone companies don’t necessarily alert you when your subscription is about to end.

Yours may have ended without you knowing, making your sim card unrecognizable by your Samsung Galaxy S21 2. Check your contract to see if it is the problem.

Misplacement, damaged sim card, or damaged phone

These are usually the cause of an unrecognized sim card on Samsung Galaxy S21 2. First verify that your sim card is well-placed in your Samsung Galaxy S21 2. Read your phone’s notice to know how to place it correctly.

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It is also possible that your phone or sim card has been damaged, either by falling or getting wet.

If so, use your warranty to replace your sim or your phone.

Clear the partition cache of your Samsung Galaxy S21 2

The system cache partition stores temporary system data. It allows the system to access applications more quickly and efficiently, but sometimes it gets cluttered and outdated, and prevents your Samsung Galaxy S21 2 from functioning correctly.

Do not worry, it will not lead to any loss of personal data or settings.

Here is how you can do it : first go to the “Settings” menu, then scroll down to “App manager” and tap on it.

Go to an app.

Eventually, select “Clear data, Clear cache”. It’s done !

Try new sim card

If the problem persists, it may be because your sim card is obsolete.

First, try your sim card in another phone.

If it doesn’t work you then have to contact your phone operator, so they send you a new one.

Be careful, you will maybe change numbers, if so, do not forget to warn your contacts.

Search for hardware issues

Some phone models may have a hardware issue.

To know if it’s the case of your Samsung Galaxy S21 2, search online if Samsung Galaxy S21 2 users have the same problem as you do. If so, go to your phone provider and use your warranty to get a new one.

If you do not have the time to do it immediately, there is an easy trick to fix the unrecognized sim card issue on your Samsung Galaxy S21 2 : apply pressure on the sim card.

To do so while using your phone, place a folded piece of paper on top of your sim card when inserting it.

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It will help you keep using your phone until you go and replace it.

To conclude

Through this article, we have explained to you many ways to fix an unrecognized sim card issue on your Samsung Galaxy S21 2. If the problem persists, stay calm and go to an expert that will help you solve the problem.

Why is my Samsung not recognizing my SIM card?

Reinsert the SIM card, making sure it is properly installed in the tray. On most models, the SIM card should be placed on the tray with the gold-colored contact facing upwards. If you insert the tray into the slot while the SIM card is placed improperly, the SIM card may not be recognized.

How do I fix my SIM card on my Samsung s21?

Why is my phone suddenly not detecting SIM card?

Carefully clean the SIM card If simply reseating the SIM card didn’t do the trick, your phone might benefit from ensuring the card is clean and the contacts are clear. Remove the SIM card from your phone, carefully extract it from the tray and then use a microfiber cloth to wipe away any dust, dirt, or debris.

Why is my Samsung s21 not reading my SIM card?

Loose SIM card slot will caused the card losing the connection with the reader of the device. Solution: You can try to apply some pressure to the slot check again if the slot hold the SIM properly. 3. Dust over the slot and SIM card reader making the slot incapable of reading the card properly.

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4 ancillary questions

Why is my s21 saying no SIM card?

Why Does My Phone Say No SIM Card? The reason why your phone show no SIM card error is that your phone is unable to properly read the contents of your SIM card. This usually happens when your SIM card is not installed properly, it is damaged, or your phone has software problems after a software update.

What to do if SIM is not detecting?

– Toggle airplane mode.
– Restart your phone.
– Remove and reinstall the SIM card.
– Carefully clean the SIM card.
– Try the SIM card in another device.
– Update your carrier settings.
– Reset your phone’s network settings.

Why is my Samsung phone not detecting SIM card?

Clean the SIM card and tray with a clean, dry cloth. Reinsert the SIM card, making sure it is properly installed in the tray. Once everything is secured back into place, turn your phone on again and see if the error is gone. This usually happens after modifying your phone settings and manually switching menu options.

Why is my SIM card suddenly not detected?

There are a few reasons your phone might not detect a SIM card. It could be a problem with the SIM card itself. You might not have placed the SIM card in the tray correctly, or the card might be dirty or damaged. You will also have connection issues if the old SIM and your new phone are incompatible.