For the tool to function, the target smartphone must be placed in . This is often achieved through a specific dialer code, such as *#*#717717#*#* on many Xiaomi/Qualcomm devices. Once in Diag Mode, the computer recognizes the device as a COM port, enabling the tool to communicate with the hardware's modem partitions. The process generally involves:
Before writing anything, back up your current NV data. Use or Ultimate Qualcomm Tool (UQT) to save a full QCN backup. This ensures you can revert if something goes wrong. qualcomm-smartphone-write-imei-tool-v1.01.zip