| Category | Example AT Command | Usage | | :--- | :--- | :--- | | | ATI | Gives manufacturer information of the modem. | | | AT^CGMR | Gives the firmware version. | | | AT^CGSN | Gives the IMEI (International Mobile Equipment Identity) number. | | Unlocking Commands | AT^CARDLOCK? | Checks the SIM lock status and the number of remaining unlock attempts. | | | AT^CARDLOCK="xxxxxx" | Enters the unlock code (where xxxxxx is your specific code) to remove the network lock. | | Diagnostic & Mode Control | AT^U2DIAG=0 | Puts the device into Modem Mode (essential for unlocking or firmware updates). | | | AT^U2DIAG=1 | Enables Modem and CD-Rom Mode (the standard mode for most dashboards). | | | AT^U2DIAG=256 | Puts the device into Modem + Card-Reader Mode (for accessing storage). | | | AT+ZCDRUN=F | A ZTE-specific command often used to wake up a modem or switch its mode. | | Voice Feature Management | AT^CVOICE=? | Queries the current voice feature status (enabled or disabled). | | | AT^CVOICE=0 | Enables the voice feature on supported Huawei HSPA modems. | | System Configuration | AT^SYSCFGEX=? | Queries the available system modes, bands, and roaming settings. | | | AT^SYSCFGEX=<acqorder>,... | Sets specific network acquisition orders and frequency bands. | | General Control | ATZ | Resets the modem to its default configuration (a good first step for troubleshooting). | | | AT^CFUN=1 | Restarts the modem. | | Command Discovery | AT^CLAC | Lists all supported AT commands for your specific device. |
| Command | Description | |---------|-------------| | login <username> <password> | Login to dc-unlocker account | | credits | Check remaining credits |
Before running commands that change deep system parameters ( AT^NVWREX ), back up your device's NVRAM data.
AT^CIMEI="xxxxxxxxxxxxxxx" — Changes/repairs the IMEI number on specific older Qualcomm-based Huawei modems. dc-unlocker commands list
Select your device manufacturer from the dropdown menu (or choose "Any Huawei" for Huawei devices). Select your specific model, or leave it on "Auto detect". Click the (Detect Device).
: Checks GPRS/packet data network registration status.
| Command | Description | | --- | --- | | dc-unlocker2.exe -i | Lists all available ports with device info (vendor, model, IMEI). | | dc-unlocker2.exe -i port | Shows detailed info for a specific port (e.g., COM10). | | dc-unlocker2.exe -i port=COM3 | Targets a specific port manually. | | Category | Example AT Command | Usage
Using AT commands through DC-Unlocker gives you direct communication with your device’s modem hardware. This guide provides a comprehensive list of essential DC-Unlocker commands, troubleshooting steps, and optimization techniques. Getting Started: Accessing the DC-Unlocker Command Line
These commands help when devices are not detected or unlock fails.
Once detected, click into the large white terminal area at the bottom of the window. Type your desired AT command and press . | | Unlocking Commands | AT^CARDLOCK
AT^SYSCFG=14,2,3FFFFFFF,2,4 — Forces the modem to use . AT^SYSCFG=14,3,3FFFFFFF,2,4 — Sets 3G Preferred mode. AT^SYSCFG=13,3,3FFFFFFF,2,4 — Sets 2G Preferred mode. Huawei LTE Band Locking
DC-Unlocker is the industry-standard software for unlocking, repairing, and configuring data cards, USB modems, and mobile Wi-Fi routers. While its graphical user interface (GUI) makes basic unlocking simple, the true power of DC-Unlocker lies in its command-line interface.