AT^NVREAD — Reads specific Non-Volatile RAM parameters from the device. AT^NVWRITE — Writes data back to specific NVRAM blocks.
AT^CARDLOCK="[UNLOCK_CODE]" – Manually applies an unlock code to a Huawei device. Replace [UNLOCK_CODE] with your actual 8-digit or 16-digit network unlock code.
AT^SYSCFG=2,2,30000000,2,4 — Sets network selection mode to automatic. For ZTE Devices: AT+ZSNT=1,0,0 — Automatic network selection. AT+ZSNT=2,0,0 — GSM (2G) only. AT+ZSNT=3,0,0 — WCDMA (3G) only. AT+ZSNT=4,0,0 — LTE (4G) only. 4. Device Mode and Port Configuration
This article provides a detailed breakdown of the , including essential AT commands for unlocking, diagnostic purposes, and port configuration. What is DC-Unlocker and Why Use Commands?
To send manual commands to your device, you must first establish a proper connection. Launch the DC-Unlocker application on your PC. Connect your modem or router via a USB cable. dc-unlocker commands list
dc-unlocker2.exe -i dc-unlocker2.exe -x Huawei -u
| Error Message | Fix Command / Action | | --- | --- | | No device found | Run dc-unlocker2.exe -i to see ports. Install drivers. | | Locked by another application | Close Huawei HiSuite, PC Suite, or modem manager. Then retry. | | Not enough credits | -check_credits to verify balance. | | Unlock code wrong | Re-read code with -u . Some devices need -f nck first. | | IMEI write failed | Try -write_nv method instead. Or reboot the device to download mode. |
AT^U2DIAG=1 – Sets the device to mode (Standard factory setting).
AT^SYSCFG=mode, order, band, roaming, domain – Configures network acquisition modes on older Huawei hardware. Replace [UNLOCK_CODE] with your actual 8-digit or 16-digit
AT+CSQ – Displays the current signal quality. The results return two numbers; a higher first number indicates a stronger cellular reception.
DC-Unlocker includes a powerful terminal for sending low-level AT (Attention) commands directly to the device.
Result: ^CARDLOCK: 1,10,0 means the device is currently locked 1.2.2 . 2. Unlocking Commands (Huawei)
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. AT+ZSNT=2,0,0 — GSM (2G) only
These commands manipulate the security locks or reset the modem to clear out corrupted profiles.
The following table summarizes the main categories of AT commands available within DC-Unlocker, along with examples and their uses.
: Forces the device into 2G Only mode.
DC-Unlocker is a specialized software application that provides "direct unlock" functionality for modems, routers, and phones. It works by connecting to the device in special manufacturer mode, enabling users to: Directly unlock network restrictions. Generate unlock codes. Repair IMEI numbers. Edit band lists. Flash firmware or update dashboards.