You can download the tool from reputable community repositories such as: Hovatek Forum Xiaomi Tools Repository How to Use QMSL Tool v1.4 (Step-by-Step)
Connect your device to the PC and enable USB Debugging . Use an ADB command or a specific dialer code (e.g., *#*#717717#*#* for Xiaomi) to enter Diagnostic (Diag) Mode . qmsl imei and sn writer tool v1 4 download
The tool is highly efficient, typically under 5MB in size. You can download the tool from reputable community