On Qualcomm-powered smartphones, IMEI data is not stored in the Android operating system. Instead, it resides in a dedicated hardware partition called and EFS (Embedded File System) . Specifically, the IMEI values are stored in NV items 5010 and 5011 (for IMEI1 and IMEI2). These encrypted storage areas, typically bundled into a file called QCN (Qualcomm Configuration) , contain everything from IMEI numbers to Wi-Fi MAC addresses, Bluetooth addresses, and radio frequency calibration parameters.
If your Qualcomm device has lost its network connectivity due to an IMEI error, you should avoid unverified third-party software. Use official and safe channels instead. 1. Restoring a Personal EFS Backup qualcomm imei rebuilder tool
The technician enables Qualcomm Diagnostic Mode on the device (often via ADB commands like setprop sys.usb.config diag,adb or special engineering codes). On Qualcomm-powered smartphones, IMEI data is not stored