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

For devices where manual methods fail, dedicated software can automate the process:

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

*#7284# : (Older models) Select for USB and DM+MODEM+ADB . *#9090# : Select DM/DUM over HS-USB . LG ##3424# For devices where manual methods fail, dedicated software

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

DIAG mode is essential for performing advanced technical tasks like , baseband fixing , QCN reading/writing , and network unlocking . 🛠️ Prerequisites This method typically requires

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

*#0808# : Select or RMNET + DM + ADB and tap OK . Enter the following commands sequentially: adb shell su

##3424# then select or use a service tool like XTC 2 Clip. 💻 Method 2: ADB Commands (Root Required)