For example, if your device loses its IMEI or the WIFI address, can you cope up with the consequences? Absolutely, not. It happens because some data gets corrupted after being used for a long time, and stops working. In such cases, we need to carry out the data from another device. So, I will provide you with the Xiaomi QCN files for all models. As a bonus, I am going to show you the way to backup or restore the QCN files on your Qualcomm based Xiaomi devices.