Before downloading, understand what makes version 103 (or the patch labelled "103") special:
There are three methods:
Once connected, your PC should detect Qualcomm HS-USB QDLoader 9008 (COM port 3-20). download fix hydra qualcomm tool 103
Error 104 means the device reset during communication. Reconnect battery, ensure your phone isn’t in high-Z state, and try a different programmer loader. Before downloading, understand what makes version 103 (or