HUAWEI Mate 20: Unrecognized SIM card

You have just purchased an HUAWEI Mate 20 and when you turn it on, it displays the following error message: SIM card not recognized. Sometimes the HUAWEI Mate 20 does not recognize the SIM card and displays this message. In this circumstance, it is not necessarily necessary to bring the HUAWEI Mate 20 directly back. Indeed, there are several methods to fix this problem. We will consequently discover in this tuto, what are the things to do and confirm to ensure that the SIM card is recognized on your HUAWEI Mate 20.unrecognized-sim-card-huawei-mate-20

How to proceed when the SIM card is not recognized on my HUAWEI Mate 20

If perhaps the SIM card is not recognized on your HUAWEI Mate 20, below is a list of things that can help you discover the source of the problem, discover repairing the problem.

Clean SIM card

One of the first things to do if the SIM card is not recognized on your HUAWEI Mate 20 is to wash it up. In fact, it may happen that dirt partially prevents the contact between the SIM card and the telephone. To clean 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 HUAWEI Mate 20

Sometimes the problem may be caused by the tracking of the SIM card. In fact, it often occurs that tiny metal plugs that normally have to come in contact with the SIM card are a bit relaxed. When this is the case, this prevents the HUAWEI Mate 20 from reading the SIM card. To fix this problem, you just 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 telephone

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

Try another SIM card on your HUAWEI Mate 20

If perhaps the two previous steps do not give anything, it is necessary to test a different SIM card to find out in the event that the problem comes from the card. Indeed, in the event that other SIM card function on the HUAWEI Mate 20, it is because the problem comes from the card. Otherwise, it is at the level of the telephone that we will have to look.

Verify that your HUAWEI Mate 20 is not Simlocker

If you have tried several SIM cards on the HUAWEI Mate 20 and non-e are recognized, the telephone could possibly be Simlocker. It indicates that the HUAWEI Mate 20 will recognize just the SIM card of a certain operator. In this circumstance, you have to unlock it. You will find without a hassle a lot of provide on the web that can do that.

Check that the problem doesn’t be caused by the ROM installed on the HUAWEI Mate 20

This part mainly concerns the people who root the HUAWEI Mate 20 to install a ROM that is not original. If perhaps this is actually what you have completed, be aware that the unrecognized SIM card problem is quite common after installing fresh 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 HUAWEI Mate 20 and the SIM card back to 1 of your operator’s shops.