Samsung Galaxy S21+: Unrecognized SIM card

You have just acquired an Samsung Galaxy S21+ and when you turn it on, it displays the following error text message: SIM card not recognized. At times the Samsung Galaxy S21+ does not recognize the SIM card and displays this message. In this case, it is not necessarily required to bring the Samsung Galaxy S21+ directly back. In fact, there are a lot of techniques to solve this issue. We will therefore see in this content, what are the stuff to do and check to ensure the SIM card is recognized on your Samsung Galaxy S21+.unrecognized-sim-card-samsung-galaxy-s21+

How to proceed when ever the SIM card is not recognized on my Samsung Galaxy S21+

In the event that the SIM card is not recognized on your Samsung Galaxy S21+, below is a list of stuff which could help you determine the source of the issue, see repairing the issue.

Clean SIM card

One of the first stuff to do if the SIM card is not recognized on your Samsung Galaxy S21+ is to wash it up. In fact, it may happen that dirt partially prevents the contact between the SIM card and the smartphone. To wash it, pass a small dab of cloth over it and check if it is not damaged.

Check the tracking of the SIM card on your Samsung Galaxy S21+

At times the issue may come from the tracking of the SIM card. In fact, it often happens that small metal plugs that most of the time have to come in contact with the SIM card are a little bit relaxed. When this is the case, this prevents the Samsung Galaxy S21+ from reading the SIM card. To solve this issue, you just need to thicken the SIM a little by gluing one or two pieces of tape at the back.

Test the SIM card on another cellphone

To find out if the issue comes from the SIM card, you can test it on another phone and you will have your answer. If it is not recognized on other devices, you can modify the SIM card.

Try another SIM card on your Samsung Galaxy S21+

In the event that the two previous steps do not give anything, it’s required to test another SIM card to find out in the event that the issue comes from the card. In fact, in the event that other SIM card work on the Samsung Galaxy S21+, it’s because the issue comes from the card. Otherwise, it’s at the level of the cellphone that we will have to look.

Check that your Samsung Galaxy S21+ is not Simlocker

When you have tried a lot of SIM cards on the Samsung Galaxy S21+ and none are recognized, the cellphone may be Simlocker. This implies that the Samsung Galaxy S21+ will recognize only the SIM card of a certain operator. In this case, you have to unlock it. You will find without a hassle a lot of offer on the internet which could do that.

Check that the problem does not come from the ROM installed on the Samsung Galaxy S21+

This part mainly concerns the people who root the Samsung Galaxy S21+ to install a ROM that is not initial. In the event that this is actually what you have done, be aware that the unrecognized SIM card issue is quite common after setting up fresh ROMs. We highly recommend that you reinstall an initial ROM and re-test it.

In the event that nothing functions

In the event that all the above solutions do not work, we recommend you to bring your Samsung Galaxy S21+ and the SIM card back to one of your operator’s shops.