These are hardware-software combos used by repair shops. They provide automated scripts to "Repair IMEI" by writing the original number back into the EFS block. 3. The "WriteDualIMEI" or QCN Edit Method
Supports direct unlock, IMEI repair, and FRP reset for models including G820N, G820QM, G820TM, Usually requires a physical box or digital license credits. 2. LGUP Tool (Free/DIY Method) lg g8 imei repair