adb reboot edl (or hold Vol+ & Vol- while connecting USB)
The is a critical software component for repairing network-related issues on your device . QCN, which stands for Qualcomm Calibration Network , acts as a backup for the device's modem-related partitions, storing sensitive data like IMEI numbers, baseband information, and network calibration values. Why You Need a OnePlus 7T Pro QCN File oneplus 7t pro qcn file top