You have just bought an LG K40S and when you turn it on, it displays the following error text message: SIM card not recognized. From time to time the LG K40S does not recognize the SIM card and displays this message. In this circumstance, it is not necessarily required to bring the LG K40S directly back. Indeed, there are many tricks to solve this problem. We will consequently see in this tuto, what are the things to do and confirm to ensure the SIM card is recognized on your LG K40S.
How to proceed when ever the SIM card is not recognized on my LG K40S
In the event that the SIM card is not recognized on your LG K40S, below is a list of things which could help you identify the source of the problem, see repairing the problem.
Clean SIM card
One of the first things to do if the SIM card is not recognized on your LG K40S is to clean it up. Actually, it might happen that dirt partially prevents the contact between the SIM card and the mobile phone. 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 LG K40S
From time to time the problem might result 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 little relaxed. When this is the case, this prevents the LG K40S from reading the SIM card. To solve this problem, you just have to thicken the SIM a little by gluing 1 or two pieces of tape at the back.
Test the SIM card on another phone
To find out if the problem comes from the SIM card, you’re able to test it on another phone and you will have your answer. In case it is not recognized on other devices, you’re able to modify the SIM card.
Try another SIM card on your LG K40S
In the event that the two previous steps do not give anything, it is required to test another SIM card to find out in the event that the problem comes from the card. Indeed, in the event that other SIM card work on the LG K40S, it is because the problem comes from the card. Otherwise, it is at the level of the phone that we will have to look.
Verify that your LG K40S is not Simlocker
In case you have tried many SIM cards on the LG K40S and non-e are recognized, the phone may perhaps be Simlocker. This means that the LG K40S will recognize only 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 internet which could do that.
Check that the problem doesn’t result from the ROM installed on the LG K40S
This part mainly concerns the people who root the LG K40S to install a ROM that is not initial. In the event that this is actually what you have completed, be aware that the unrecognized SIM card problem is quite common after setting up fresh ROMs. We 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 advise you to bring your LG K40S and the SIM card back to 1 of your operator’s shops.
