Before diving into the technical solution, it’s important to understand the device itself. The POCO X4 Pro 5G, launched in 2022, is powered by the chipset, a 5G-enabled processor that forms the foundation of all network-related data stored on the phone. The 128GB storage variant typically comes with 6GB of RAM and is known for its 6.67-inch AMOLED display with a 120Hz refresh rate, a 108MP main camera, and a substantial 5,000 mAh battery with 67W fast charging.
Check your Windows . You should now see a new port listed under "Ports (COM & LPT)" labeled as Qualcomm HS-USB Diagnostics 901D (or similar). 2. Clear Corrupted EFS Data (Important)
A highly compressed archive format. You will need a utility tool like 7-Zip or WinRAR to extract the raw .qcn file from the downloaded archive.
Go to and tap MIUI/HyperOS Version 7 times to unlock Developer Options. poco x4 pro 5g 128gb qcn tested7z free
Flashing a QCN file requires specific toolsets and systematic preparation to avoid permanently hard-bricking your smartphone.
(codename: veux or peux ) , your phone’s EFS partition may have become corrupted. When this happens, the device completely loses its ability to communicate with cell towers.
Flashing a new QCN over corrupted data often fails. You must clear the old network data first using TWRP recovery terminal or an ADB shell with root privileges: Before diving into the technical solution, it’s important
At the heart of the device is the Qualcomm Snapdragon 695 5G chipset, a capable mid-range processor that supports 5G networks. Coupled with up to 8GB of RAM and 128GB of internal storage (expandable via microSD), the Poco X4 Pro 5G handles multitasking and demanding applications with ease.
Connect your device to the PC using a high-quality USB cable.
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Always ensure you are using the correct regional firmware and, whenever possible, attempt to repair the original calibration data rather than replacing it with a donor file.
A QCN file is a data backup of a device's network configuration and calibration settings. It is stored in the Qualcomm-based internal memory and contains: . Network calibration values for 2G, 3G, 4G, and 5G. Modem and Baseband configurations .