The following is a list of the most common DC-Unlocker terminal and AT commands used to service modems and mobile devices. Essential DC-Unlocker AT Commands
These commands are typically entered directly into the terminal window of the DC-Unlocker client to modify modem behavior or unlock features.
AT: Tests the connection to the modem. If the device is connected correctly, it should respond with OK.
AT^CARDLOCK="nck code": Directly enters the unlock code into the modem to remove carrier restrictions.
AT^CARDUNLOCK="nck md5 hash": Resets the counter for unlock attempts if it has reached the maximum.
AT^U2DIAG=0: Sets the device to modem-only mode, which can improve detection speed for certain software.
AT^U2DIAG=255: Resets the device to its default mode (Modem + CD-ROM + Card Reader).
AT^SETPORT="A1,A2;2,7": Used for Huawei modems to disable CD and SD modes while maintaining the PCUI and NDIS modes.
AT+CFUN=1: Restarts the device and enables full functionality.
AT+CPIN?: Checks the status of the SIM PIN (e.g., if it is ready or requires a code). Command Line & Fastboot Commands
For certain operations like bootloader unlocking, DC-Unlocker utilizes the ADB/Fastboot toolkit. dc-unlocker commands list
fastboot devices: Verifies that your phone is correctly connected in fastboot mode.
fastboot oem unlock [password]: Unlocks the device's bootloader using a specific 16-digit key obtained through DC-Unlocker services. Standard DC-Unlocker Workflow
While commands are useful, most tasks are handled through the DC-Unlocker client interface:
Detect Device: Use the magnifying glass icon to auto-detect the connected manufacturer and model.
Server Login: Enter your DC-Unlocker credits account info in the "Server" tab.
Perform Action: Navigate to the "Unlocking" tab and click Unlock or Do Job. Huawei AT Commands for 3G Modems | PDF - Scribd
DC-Unlocker typically uses the standard AT Command set to interact with and unlock modems, routers, and mobile devices
. These commands are entered directly into the terminal window at the bottom of the DC-Unlocker client interface
Below are the most common commands used for Huawei and other compatible modems: Common Unlocking & Status Commands
These commands are used to check the current lock status and apply unlock codes: AT^CARDLOCK? : Checks the SIM lock status. The first digit indicates the lock status: means locked, or higher means unlocked or SIM lock cleared. The following is a list of the most
The second digit shows the number of remaining unlock attempts. AT^CARDLOCK="unlock_code"
: Used to manually enter the 8-digit NCK (Network Control Key) unlock code generated by your IMEI. AT^CARDUNLOCK="nck md5 hash"
: A specific command used for some newer Huawei models (like E353, E173) to reset the counter of unlock attempts. Device Mode & Connectivity Commands
These commands change how the device is recognized by your computer: AT^U2DIAG=0 : Sets the device to modem mode only. AT^U2DIAG=1 : Sets the device to modem + CD-ROM mode. AT^U2DIAG=255
: Resets the device to default (Modem + CD-ROM + Card Reader). AT^SETPORT="A1,A2;1,2,3,7,A1,A2,4,5,6,A,B,D,E"
: Configures the port modes for newer Huawei devices to enable specific diagnostic ports. Network Selection Commands
Used to force a specific connection type if the device supports it: AT^SYSCFG=2,1,3FFFFFFF,2,4 : Force the device to use AT^SYSCFG=14,2,3FFFFFFF,2,4 : Force the device to use : Enables HSDPA mode. : Enables HSPA+ mode. General Identification Commands : Displays manufacturer, model, and firmware revision. : Shows the device's Serial Number/IMEI. : Displays the firmware version. НТК Интерфейс
Always perform these operations without a SIM card or memory card in the device to ensure a reliable connection. Many features, such as direct unlocking, are automated through the "Unlock" tab in the official DC-Unlocker software and may require credits. manually generate an unlock code for a specific modem model? Huawei AT Commands for 3G Modems | PDF - Scribd
DC-Unlocker is a specialized utility used primarily for unlocking, repairing, and servicing modems, routers, and phones
. While most actions are handled through its graphical user interface (GUI), advanced users often use the built-in terminal to send specific AT commands to interact directly with device firmware. Essential DC-Unlocker Terminal Commands Important : DC-Unlocker is a paid tool (credits-based)
The following commands are commonly used in the DC-Unlocker 2 Client terminal to manage Huawei and ZTE devices:
: The basic "Attention" command to check if the device is communicating with the computer. The device should respond with AT^CARDLOCK="
: Manually enters the Network Control Key (NCK) to unlock the modem for any SIM card. AT^DATALOCK="
: Unlocks the device's data protection, which is often required before executing other sensitive service commands. AT^U2DIAG=255
: Switches the modem to "Modem + CD-ROM + Card Reader" mode, useful for ensuring all drivers are visible. AT^U2DIAG=0
: Sets the device to "Modem only" mode, which can resolve detection issues in some software. : Reboots the device to apply changes. : Displays the manufacturer's name. : Displays the specific model name. : Retrieves the device's IMEI number. Onomondo.com Common Service Procedures Netgear MR6500 Repair IMEI... AT command error
Important: DC-Unlocker is a paid tool (credits-based). Most commands work only after detecting the device and having sufficient credits.
Always back up your modem’s firmware/NV data before using unlock commands.
Here is the complete template for any DC-Unlocker command:
dc-unlocker2.exe -x [VENDOR] [COMMAND] [VALUE] -port [COM?] -silent -auto_exit
Parameter breakdown:
-x : Vendor selection (Huawei, ZTE, Sierra, Alcatel, etc.)-u : Unlock command-w IMEI : Write IMEI-port : Force specific COM port-silent : No popups-auto_exit : Close after finishReal example (full unlock + IMEI restore):
dc-unlocker2.exe -x Huawei -port COM5 -u
dc-unlocker2.exe -x Huawei -port COM5 -w IMEI 354829101234567
dc-unlocker2.exe -x Huawei -band "LTE:1,3,7,20"
| Command | Description |
| --- | --- |
| dc-unlocker2.exe -x [vendor] | Select device application (e.g., -x Huawei). |
| dc-unlocker2.exe -x ZTE | Switches to ZTE protocol. |
| dc-unlocker2.exe -x Sierra | Sierra Wireless modems. |