All-in-one-enable-diag-reset-tool-for-samsung-lg-htc-huawei-qualcomm-my-blog [ UPDATED ✦ ]

*#7284# : (Older models) Select for USB and DM+MODEM+ADB . *#9090# : Select DM/DUM over HS-USB . LG ##3424#

Check on your PC; the device should now appear under Ports (COM & LPT) as a "Qualcomm HS-USB Android Diagnostics" port. 🧰 All-in-One Tools (Third-Party) *#7284# : (Older models) Select for USB and DM+MODEM+ADB

Before attempting to enable DIAG mode, ensure you have the following: Install Qualcomm HS-USB QDLoader 9008 drivers for your PC. ADB Tools: Ensure you have ADB and Fastboot installed. This method typically requires

If dialer codes don't work, you can use ADB commands from your computer. This method typically requires . Connect your phone to the PC. Open a terminal (CMD or PowerShell). Enter the following commands sequentially: adb shell su setprop sys.usb.config diag,adb Use code with caution. Copied to clipboard 855 for G3)

*#0808# : Select or RMNET + DM + ADB and tap OK .

Many brands provide hidden dialer codes to quickly toggle USB modes. Open your phone's dialer and try the following:

5457#*#xxxx# (Replace xxxx with your model number, e.g., 855 for G3)