How to use QFIL to backup & restore QCN/IMEI on Qualcomm - YouTube
How To Rebuild QCN Files: (Edit & Change the IMEI in any QCN File) - [romshillzz] - YouTube
IMET Mobile Repairing Institute (BUNTYGSM) - Xiaomi Mi 8 SE QCN File For Fix Baseband IMEI Repair Network Problem https://ift.tt/2sCfS4g Download Xiaomi Mi 8 SE QCN File, and Other Files Xiaomi Mi
How to backup Restore QCN File using QFIL tool
GUIDE] Backup, edit and restore QCN. Fixing lost IMEI. | XDA Forums