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Before the computer can interact with the network files, you must enable the DIAG port . Connect your device to a PC.
Launch your Hex Editor (e.g., HxD) and open the downloaded .
To initiate communication with your device, you must unlock developer privileges. Go to > About Phone > Version . oneplus 7t pro qcn file top
must be rooted via Magisk to unlock its low-level diagnostic ports. Step-by-Step Guide to Restore Your OnePlus 7T Pro Step 1: Enable USB Debugging Open > About Phone . Tap Build Number 7 times until developer permissions open. Go back to Settings > System > Developer Options . Scroll down and toggle USB Debugging to ON. Step 2: Open the Diagnostic Port (Diag Mode)
A QCN (Qualcomm Calibration Network) file contains NV (non-volatile) calibration and configuration data for Qualcomm-based devices. It stores critical modem and radio parameters — IMEI, RF calibration, network configuration, MAC addresses, and other NV items necessary for cellular, Wi‑Fi, and Bluetooth functionality. Restoring a device’s QCN can recover network connectivity and correct radio-related issues after flashing ROMs, corrupting NV data, or hardware repairs.
dd if=/dev/zero of=/dev/block/bootdevice/by-name/modemst1 dd if=/dev/zero of=/dev/block/bootdevice/by-name/modemst2 dd if=/dev/zero of=/dev/block/bootdevice/by-name/fsg Use code with caution. This public link is valid for 7 days
Does your phone currently show an when dialing *#06# ?
If your IMEI is restored but you still cannot connect to a network, your network partitions might be locked. You must use a terminal emulator on your rooted device to completely wipe the corrupted EFS blocks before attempting the QCN restore process again. Execute these specific commands in ADB shell as root:
Enabled via ADB or a dialer code ( *#12345# or *#8011# ). 📂 How to Restore OnePlus 7T Pro QCN Can’t copy the link right now
To backup or restore your QCN file, you will need the following:
Open a command prompt inside your PC's platform-tools folder.
OnePlus 7T Pro Model Variants: