To fix the issue, you will need a from a working LG G8 of the exact same variant.
If your LG G8 has lost its network capability, follow these diagnostic steps sequentially before jumping into deep partitioning tools:
This article provides an in-depth look at methods, focusing on legitimate, technical solutions available in 2026. What Causes an Invalid or Null IMEI on LG G8? lg g8 imei repair
An interruption during a firmware update or flashing a custom ROM can corrupt the EFS partition, where the IMEI is stored.
Open an NV editing tool (like IMEI Rebuilder ) to open the donor QCN file. Locate the IMEI fields, replace the donor IMEI with your phone's original legal IMEI, and save the modified file. To fix the issue, you will need a
Professional boxes like Octopus Box can be expensive for a one-time use, often requiring a license plus additional "credits" for certain operations. ⚠️ Critical Risks and Considerations
If IMEI is 0000000000 , it's usually a software/EFS issue. If it is Null or empty, it could be a hardware issue with the modem itself. Summary of Supported LG G8 Models Octoplus box supports many variants including: LM-G820N, LM-G820QM, LM-G820TM, LM-G820UM. It also supports Repair OPID Mismatched for these variants. An interruption during a firmware update or flashing
The LG G8 ThinQ relies on a Qualcomm Snapdragon 855 chipset. Critical device-specific data—including the IMEI, baseband configuration, Wi-Fi MAC address, and calibration data—is stored in dedicated, protected storage partitions on the UFS drive.