For technicians or advanced users, professional "box" software is the standard. These tools are highly reviewed by the repair community but require physical hardware and technical knowledge. Octoplus / Octopus Box
A failed firmware flash via LGUP can lead to "Null" IMEI. Methods for Repair & Restoration 1. Flashing a Modified QCN File (Advanced) lg v50 imei repair
ChimeraTool is a popular choice for technicians because it simplifies the connection process. For technicians or advanced users