Proceed with extreme caution. If your phone’s IMEI is null and you have no other recourse, Qlm V1.0.2 has a high success rate on Snapdragon 600–865 series. But you must accept the risk of turning your device into a paperweight.
: Qualcomm HS-USB QDLoader 9008 or Diag drivers are necessary for the PC to recognize the phone's internal hardware. Conclusion Qlm Imei Repair Tool V1.0.2
: Open the Qlm IMEI Repair Tool, select the correct COM port, enter the original IMEI (found on the box or under the battery), and click "Repair" or "Write." Proceed with extreme caution