IMEI invalid after flashing the stock ROM or firmware flash file is a normal issue that often comes in Media Tek Acer Liquid Z6 Plus T11 phones. if you facing this issue then don’t worry this is normal and you can repair it by your self. if you search on the internet there are so many tools available that can fix your Invalid IMEI issue. Today I am going to solve Acer Liquid Z6 Plus T11 invalid IMEI issue with a very simple tool. we will use Maui META IMEI Repair Tool to fix Acer Liquid Z6 Plus T11 Invalid IMEI nulled problem.

How To Repair Acer Liquid Z6 Plus T11 Invalid IMEI

We will use Maui META IMEI Repair Tool to fix Acer Liquid Z6 Plus T11 Invalid IMEI nulled problem. there is also a chance of unknown baseband issue to check baseband go to your phone setting > about phone > baseband version if there is no version detail and it only says unknown baseband then i recommend you to first flash stock firmware and then come to this page again.

Requirements To Repair Acer Liquid Z6 Plus T11 Invalid IMEI :

Download Maui META Imei Repair Tool.

Download Install Mediatek USB VCOM drivers on the PC.

Step 1. Unzip Maui META, install it on the PC then run as Administrator. It should be installed to Program files or Program files (x86) folder depending on your PC’s architecture.

Step 2. Wait till the Maui META dashboard appears with a red circle. Under Connection Type, select the option which best describes your device.

Step 3. Click Reconnect at the top–right corner. The color of the circle should start changing between red and green. Switch off the phone (still with battery inside) and connect it to the PC without holding anybutton on the phone.

Step 4. The phone should boot up then get stuck at boot animation. Not to worry,its in META mode. The circle should now be yellow in color, indicating that the phone has been successfully detected.

Step 5. In the Get version box, click Get target version to confirm that the phone has been detected. The phone’s details should appear.

Step 6. You can now minimize the Get version box.

Step 7. Click on the drop down at the top left corner and select IMEI download.

Step 8. The IMEI Download box should pop up. Click on Change NVRAM Database File.

Step 9. In the window that pops up, navigate to the location of the BPLGUInfo file (often named like BPLGUInfoCustomAppSrcP_MT65**…), select it then click Open.

 

Step 10. You should see the path to the DB file under NVRAM Database File. Click SIM_1 or SIM_2depending on which you wish to write IMEI to. Now, enter the first 14 digits of the IMEI you wish to write. The digit entered in the CheckSum box will be the 15th digit of the IMEI. Once done, click Download To Flash (If IMEI keeps disappearing after factory reset then try clicking Upload From Flash instead)

 

Step 11. Once the IMEI has been successfully written to the selected SIM slot on the phone, you should see a message at the bottom saying Download IMEI to flash successfully.

Step 12. Switch off the phone either by taking out then reinserting the battery or holding the power button till it goes off. Once off, boot up the phone and dial *#06# to confirm that the IMEI was successfully written to the phone.

Note

• You can also use Maui Meta to write Serial Number back to your device by selecting the Barcodeoption. The Bardcode is 63 to 64 characters long. The First 23 characters are the Product Number followed by the Serial Number then other characters.
• To write a Serial Number of 0123456789ABCDEF for example,
• We’ll assume that product number is 11223344556677889900XYZ . Bardcode of 63 characters would then be
• 11223344556677889900XYZ0123456789ABCDEF************************