While most IoT developers focus on AT commands, the real power for troubleshooting Quectel modules (like the EC25, BG96, or BC66) lies in the QCOM tool — a serial debug utility often overlooked in official documentation.
Using the wrong QCOM version can soft-brick a module’s AT interface (fixed by reflashing). But the right version can turn a “dead” module into a debugging goldmine. If you meant a specific article you saw on the web (maybe from a blog or forum), could you share more details or a link? I can help analyze or summarize it. quectel qcom download