Samsung Galaxy M40: Unrecognized SIM card

You have just acquired an Samsung Galaxy M40 and when you turn it on, it displays the following error text: SIM card not recognized. Occasionally the Samsung Galaxy M40 does not recognize the SIM card and displays this message. In this case, it is not necessarily necessary to bring the Samsung Galaxy M40 directly back. Certainly, there are several methods to solve this trouble. We will consequently observe in this content, what are the stuff to do and verify so that the SIM card is recognized on your Samsung Galaxy M40.unrecognized-sim-card-Samsung-Galaxy-M40

How to proceed when ever the SIM card is not recognized on my Samsung Galaxy M40

If the SIM card is not recognized on your Samsung Galaxy M40, below is a list of stuff that will help you determine the source of the trouble, observe repairing the trouble.

Clean SIM card

One of the first stuff to do if the SIM card is not recognized on your Samsung Galaxy M40 is to clean it up. In truth, it might happen that dirt partially prevents the contact between the SIM card and the cellphone. To wash it, pass a small dab of cloth over it and check if it is not damaged.

Check the location of the SIM card on your Samsung Galaxy M40

Occasionally the trouble might result from the location of the SIM card. In truth, it often happens that tiny metal plugs that most of the time have to come in contact with the SIM card are a little relaxed. When this is the case, this prevents the Samsung Galaxy M40 from reading the SIM card. To solve this trouble, you just simply have to thicken the SIM a little by gluing 1 or two pieces of tape at the back.

Test the SIM card on another mobile phone

To find out if the trouble comes from the SIM card, you may test it on another phone and you will have your answer. In case it is not recognized on other devices, you may change the SIM card.

Try another SIM card on your Samsung Galaxy M40

If the two previous steps do not give anything, it truly is necessary to test another SIM card to find out if perhaps the trouble comes from the card. Certainly, if perhaps other SIM card function on the Samsung Galaxy M40, it truly is because the trouble comes from the card. Otherwise, it truly is at the level of the mobile phone that we will have to look.

Verify that your Samsung Galaxy M40 is not Simlocker

In case you have tried several SIM cards on the Samsung Galaxy M40 and non-e are recognized, the mobile phone may perhaps be Simlocker. This implies that the Samsung Galaxy M40 will recognize simply the SIM card of a specific operator. In this case, you have to unlock it. You will find without a hassle a lot of provide on the web that will do that.

Check that the problem does not result from the ROM installed on the Samsung Galaxy M40

This part mainly concerns the people who root the Samsung Galaxy M40 to install a ROM that is not initial. If this is actually what you have completed, be aware that the unrecognized SIM card trouble is quite common after installing new ROMs. We suggest that you reinstall an initial ROM and re-test it.

If nothing works

If all the above solutions do not work, we recommend you to bring your Samsung Galaxy M40 and the SIM card back to 1 of your operator’s shops.