Nokia Lumia 720: Unrecognized SIM card

You have just bought an Nokia Lumia 720 and when you turn it on, it displays the following error text message: SIM card not recognized. From time to time the Nokia Lumia 720 does not recognize the SIM card and displays this message. In this circumstance, it is not necessarily necessary to bring the Nokia Lumia 720 directly back. In fact, there are several techniques to fix this issue. We will for that reason find out in this content, what are the things to do and verify so that the SIM card is recognized on your Nokia Lumia 720.unrecognized-sim-card-Nokia-Lumia-720

What to do when the SIM card is not recognized on my Nokia Lumia 720

If perhaps the SIM card is not recognized on your Nokia Lumia 720, below is a list of things that could help you discover the source of the issue, find out repairing the issue.

Clean SIM card

One of the first things to do if the SIM card is not recognized on your Nokia Lumia 720 is to clean it up. Actually, it might happen that dirt partially prevents the contact between the SIM card and the telephone. 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 Nokia Lumia 720

From time to time the issue might originate from the location of the SIM card. Actually, it often occurs that small metal plugs that most of the time have to come in contact with the SIM card are a bit relaxed. When this is the case, this prevents the Nokia Lumia 720 from reading the SIM card. To fix this issue, you just simply need to thicken the SIM a little by gluing 1 or two pieces of tape at the back.

Test the SIM card on a different phone

To find out if the issue comes from the SIM card, you’re able to test it on a different phone and you will have your answer. When it is not recognized on other devices, you’re able to change the SIM card.

Try another SIM card on your Nokia Lumia 720

If perhaps the two previous steps do not give anything, it’s necessary to test a different SIM card to find out if the issue comes from the card. In fact, if other SIM card function on the Nokia Lumia 720, it’s because the issue comes from the card. Otherwise, it’s at the level of the phone that we will have to look.

Verify that your Nokia Lumia 720 is not Simlocker

In case you have tried several SIM cards on the Nokia Lumia 720 and none are recognized, the phone could be Simlocker. It indicates that the Nokia Lumia 720 will recognize just the SIM card of a specific operator. In this circumstance, you have to unlock it. You will find without a hassle a lot of provide on the net that could do that.

Check that the problem doesn’t originate from the ROM installed on the Nokia Lumia 720

This part mainly concerns the people who root the Nokia Lumia 720 to install a ROM that is not original. If perhaps this is actually what you have done, be aware that the unrecognized SIM card issue is quite common after setting up new ROMs. We highly recommend that you reinstall an original ROM and re-test it.

If perhaps nothing functions

If perhaps all the above solutions do not work, we advise you to bring your Nokia Lumia 720 and the SIM card back to 1 of your operator’s shops.