Adjusting radio frequency (RF) parameters for better connectivity. Technical Details and Compatibility
To understand the driver, you must first understand the port. "QC" stands for , the manufacturer of the Snapdragon chipsets found in most Motorola smartphones. "Diag" stands for Diagnostic . motorola qc diag port driver
: Connect the phone to your PC and use the following ADB command: adb shell setprop sys.usb.config diag,adb Update via Device Manager Device Manager on your PC. motorola qc diag port driver