How to Fix Invalid SIM on Itel A12 smartphone

Hello guys. Welcome again to our blog site. First, thank you for visiting and by reading my articles, you are `supporting us in a very big way. We thank you so much by your support. In today’s article, I am going to show you How to fix Invalid SIM on Itel A12 SPD smartphone. If you are having issues with network issues associated with your itel A12 smartphone missing IMEI numbers, then it means you need to write IMEI on your phone. In this article, I am going to show you the easiest way on How to Fix Invalid SIM on Itel A12 SPD smartphone.

Here is something you need to note. That changing IMEI on any phone is illegal in most countries. It is against the law the change IMEI numbers and therefore, this article is purposefully for educational purposes and should not be used for any other illegal use. If you are missing IMEI numbers on your phone you will get the INVALID SIM message when you insert SIM cards into your phone. This process on How to Fix Invalid SIM on Itel A12 will entail repairing your IMEI numbers.

Procedure on How to Fix INVALID SIM problem on Itel A12.

Now, if your itel A12 is showing invalid SIM after your SIM cards are inserted into the SIM slots, then the issue is not with the handset’s SIM slots. Many people first rush to change the SIM slots only to realize that the problem is not with the SIM slots. To check if your phone is having IMEI numbers, dial *#06# on your dial pad. If you have found out that you are getting INVALID IMEI, then you need to write IMEI numbers on your Itel A12. Before that, you need to have the following:

  1. Windows computer
  2. SPD IMEI tool. Download SPD IMEI tool here.
  3. USB Data cable
  4. Mobile flashing expertise

Now. After making sure that you meet the above requirements, you can now proceed with the following steps on how to fix Invalid SIM on Itel A12 smartphone. Check also another article on how to bypass FRP or simply Google account lock on Tecno POP 3 BB2.

Step 1

Now, after making sure and being certain that your IMEI are missing and that it is the cause of invalid SIM problem on your phone, all you need to do is to write IMEI numbers on your Itel A12. Open the phone’s back cover, remove the battery and under the battery, you will see a sticker with the IMEI numbers on it. Make a text document on the computer desktop and write those IMEI numbers down. IMEI 1 and IMEI 2.

Step 2

Now, you need to get a perfect tool to write IMEI on itel A12. In this case, you need to know that this phone is an SPD smartphone. Therefore, you need a tool that can write IMEI on SPD chipset. You will need to Download SPD IMEI repair tool from this link. Extract it on your PC and launch the Application. It will appear as below.

C:\Users\ABALA\Pictures\SPD IMEI 3.JPG

Step 3

Now on the SPD IMEI tool interface, click on the “Set” button. A window will appear where you can do several settings but in this case, all you need is to make sure that IMEI 2 is checked in order to write 2 IMEI numbers for SIM 1 and SIM 2. Click your mouse in the box at IMEI 2 and make sure a check mark appears as shown below. Then click on “SAVE” Also check a similar article on how to repair IMEI on OPPO A5S smartphone.

C:\Users\ABALA\Pictures\SPD IMEI 2.JPG

Step 4

Now back on the SPD IMEI tool interface, click on “MODE SELECT” a window will appear allowing you to select the mode for connection. Click on the calibration mode and then down click on “Select” as shown below.

C:\Users\ABALA\Pictures\SPD IMEI 4.JPG

Step 5

Now back on the interface, copy the IMEI numbers you had saved in the text document in step 1 and paste them into IMEI 1 and IMEI 2 fields respectively as shown below.

C:\Users\ABALA\Pictures\SPD IMEI 3.JPG

After that, click on the “Write” button.


Step 6

Now, switch off your off your phone, and connect it to your computer using the USB data cable. Don’t hold any button this is not flashing. The phone will connect to the PC and and your IMEI numbers will be written as shown below.


Reboot your phone and check the IMEI numbers by dialing *#06# on your dial pad. You should see the IMEI numbers now appearing. Insert the SIM cards in the SIM slot and now power on the phone again. Your service provider carrier name should now appear and your phone should be now connected to the service network again. That is how to fix INVALID SIM problem on Itel A12 smartphone.


This method works properly but the challenge is that you have to do several attempts for the tool to write your IMEI numbers on the phone. It requires patience and persistence. But finally it should have your problem solved. Finally, if you feel that I am doing a good job making these articles, kindly live a like on our Facebook page, check us on twitter and subscribe to our website to get updates on our articles as soon as we publish them. Also in case you have a query, then feel free to contact me on Facebook,

George Abala
I am a tech enthusiast with a passion for all things mobile phones, computers, software, games, and general technology tricks, tweaks & Mods. I pride in sharing this knowledge through blogging.