Step-by-Step Guide: How to Backup and Restore QCN Using QPST
The result could be a "hard brick" — a device that no longer powers on, boots, or connects to any computer. In many cases, a hard-bricked Qualcomm device requires professional JTAG repair or motherboard replacement.
Locate the IMEI fields, replace the placeholder numbers with your phone's . Save the modified file as a new .qcn file. Step 4: Restoring the Fixed QCN File Return to the QPST Software Download window. Click on the Restore tab. Imei Qcn Tool Download
There are several tools available for reading and writing QCN files. Below are the most reliable options used by professionals.
Your computer cannot read the network partitions unless the phone is in Diagnostic Mode. Go to and tap Build Number 7 times. Enter Developer Options and enable USB Debugging . Connect your phone to the PC. Step-by-Step Guide: How to Backup and Restore QCN
: Boot your phone into TWRP recovery and wipe the EFS partition using terminal commands ( dd if=/dev/zero of=/dev/block/bootdevice/by-name/modemst1 ) before attempting the QCN restore. Legal and Safety Warning
Check the box for (since you are writing a repaired file). Click Start and wait for the progress bar to reach 100%. Save the modified file as a new
: All Qualcomm smartphones (Xiaomi, OnePlus, Vivo, Oppo).
: It acts as the container for your device's network ID. Top 3 IMEI QCN Tools for Download
Writing a new QCN over a corrupted one often fails. Technicians usually clear the old data first by entering custom recovery (like TWRP) or using a service tool to wipe the efs , modemst1 , and modemst2 partitions. Step 4: Flash the QCN using QPST