Mobile routers series Huawei E5573Cs 4G hotspots are deservedly considered among the most popular devices for 4G internet distribution, but they often come with software limitations. Owners of such devices purchased from telecom operators encounter SIM locks that prohibit the use of SIM cards from other providers. The solution to this problem lies in flashing the device to a universal version or removing the unlock code.
The software update process may seem complicated to a novice, but if you strictly follow the steps, the risk of bricking your device is minimal. You'll need a computer running Windows, a working USB cable, and some free time. It's important to understand that any manipulation of system software carries risks, so attentiveness is critically important at every stage.
In this article, we'll discuss two main solutions: a paid method using instant unlocking utilities and a manual reflashing method via a web interface. The choice of method depends on your technical skills and your willingness to risk the device's warranty. Before starting, ensure the battery is charged to at least 70%, as a sudden power outage while writing data to the flash chip's memory can cause irreversible damage.
⚠️ Attention: All firmware flashing operations are performed at your own risk. The author of this article is not responsible for any possible equipment failure. Make sure your device model exactly matches the one listed. E5573Cs-322 or E5573Cs-609, since the firmware from one modification may not be compatible with another.
Preparing for flashing and diagnosing the device
Before downloading firmware files, you need to accurately identify the current state of your router. Devices Huawei have different hardware revisions, and installing the wrong software will result in a boot error. The first step is to connect the router to your computer via USB and log into the web interface at 192.168.8.1.
In the settings menu, usually under "About Device" or "Device Information," find the software version. You'll be interested in several parameters: the firmware version (Software Version), the web interface version (WebUI Version), and, most importantly, the IMEI code. Write this information down; you'll need it to select the correct firmware file or calculate the unlock code.
You should also check the lock status. If the router asks for an unlock code when you insert a SIM card from another carrier, the SIM lock is active. In some cases, the device may simply not detect the SIM card or display "No network," which is also a sign of a software lock. To continue working, you'll need drivers, which are usually installed automatically upon initial connection, but it's best to check for them in the Device Manager beforehand.
Necessary tools and software
To successfully complete the procedure, you'll need specialized software that allows you to interact with the router's bootloader. Standard browser tools only allow you to update to the official version approved by your carrier, which often doesn't resolve the SIM lock issue. Therefore, the primary focus is on third-party utilities.
The most popular tool for working with devices Huawei is a program DC-UnlockerThis is a powerful tool that can read logs, identify models, unlock devices, and flash them. You may also need a utility. Huawei Update Tool or similar scripts for forced installation of update files. All necessary files should be found on trusted forums specializing in mobile internet.
In addition to the software, please prepare the following:
- 💻 A computer or laptop with Windows OS (preferably version 7, 8.1, or 10, as there may be compatibility issues with older drivers with Windows 11).
- 🔌 A high-quality USB cable, preferably original or certified, no longer than 1 meter to avoid connection loss.
- 🔋 A charged battery or connecting the router to an external power source during the process.
- 📄 Pre-downloaded firmware files (usually archives with the .bin extension or sets of files for DC-Unlocker).
⚠️ Attention: Antivirus programs may block unlocking tools, considering them potentially unwanted. It's recommended to temporarily disable protection or add the folder containing the tools to the exclusions list before proceeding.
Unlocking method via DC-Unlocker
The most reliable and fastest way to unlock a device is to use the DC-Unlocker service. This method doesn't require searching for specific firmware files for each model, as the unlock code is generated on the server using algorithms. HuaweiThe program requires credits (paid units) to work, but results are almost guaranteed.
Run the program as administrator and click the magnifying glass button to search for the modem. If the drivers are installed correctly, the log window will display information about the model, current firmware version, and lock status. The "Simlock status" line should show "locked." If the program detects the device but cannot determine the model, you may need to switch to "Simlock mode." debug or installation of specific drivers.
Next, follow the instructions:
- In the program interface, go to the “Unlocking” tab.
- Click the "Unlock" button.
- If there are no credits on your account, the program will prompt you to purchase them or enter an activation code.
- After payment (usually 4 credits for older models or about 7 euros) the process will start automatically.
After successful unlocking, the message "Unlock successfully finished" will appear in the log. The router may reboot automatically. Now you can insert SIM cards from any carrier. This method is particularly convenient because it doesn't change the device's firmware, but merely removes the software limitation, reducing the risk of errors.
Manual flashing via web interface
If you want to not only unlock your device but also change the firmware version (for example, switch from a carrier-specific version to a global one or install a Russian-language interface), you'll need to flash it manually. This process is more risky and requires precise file selection. Firmware files for E5573Cs often have names like update_E5573Cs-322_V100R001B160D01SP00C00.webui.
The process begins with downloading the firmware file to the router's memory. This is done through the standard update interface. Go to Settings, select "System" → "System Update" → "Local Update." You'll need to select the downloaded file. However, if your carrier's firmware version prohibits downgrading or installing third-party versions, the system will return an error.
In this case, a "cross-update" method or recovery mode firmware update is used. Often, it's necessary to first flash an intermediate firmware version that doesn't have strict signature checks. After the files are successfully installed and the router reboots, it may enter update mode, which takes 5 to 15 minutes. During this time, the indicators may flash green or red.
| Parameter | Description | Meaning for E5573Cs |
|---|---|---|
| Model | Hardware platform | E5573Cs-322 / 609 / 656 |
| Interface | Control type | Huawei HiLink / WebUI |
| Frequencies | Network support | 4G LTE FDD / TDD |
| Port | Connection type | Micro-USB |
What should I do if the router doesn't turn on after flashing the firmware?
If the indicators are red or don't light at all, the bootloader may need to be flashed. Try holding the reset button and connecting the power supply. If this doesn't help, you'll need to disassemble the device and flash it via UART or an engineering cable, which is only possible with a service center.
Working with unlock codes and calculators
There is an alternative unlocking method without using paid services: calculating the code using online calculators or algorithms. For models Huawei For older generations (algorithm v1 and v2), there were free calculators that generated an unlock code based on the IMEI. However, for E5573 Most often, the v3 or v4 algorithm is used, which requires a paid calculation.
However, knowing the unlock code (NCK code) can be useful. If you received the code (for example, through DC-Unlocker without automatic unlocking, simply by purchasing a payment), you can enter it manually. To do this, insert a SIM card from another carrier; the router will ask for the code. Enter the received combination of numbers. You have a limited number of attempts (usually 10), after which the device is permanently blocked.
It is important to distinguish between codes:
- 🔓 NCK Code: Network Control Key (NCK).
- 🔒 DC Code: Data Card Code, less common.
- ⚙️ Flash Code: The code for reflashing is needed to reset the counter of attempts to enter an incorrect code.
Using calculators from unverified sources is dangerous. Many websites offer "free unlocking," but in reality, they're simply collecting IMEI databases or offering malware downloads. The only safe way to get a working code for modern versions is through authorized services like DC-Unlocker or official unlocking from your carrier (if the contract terms are met).
☑️ Check before entering the code
Possible errors and how to fix them
Various errors may occur during the flashing or unlocking process. The most common is "Device not found" in DC-Unlocker. This can be resolved by reinstalling the drivers or trying connecting the device to a different USB port, preferably directly to the motherboard, bypassing any hubs. Running the program as administrator in Windows 7 compatibility mode also helps.
Another common issue is the "Update failed" or "System file check failed" error when updating via the web interface. This means the firmware file is not compatible with your hardware revision or was corrupted during download. Check the file checksums and double-check the model number on the sticker under the battery. Clearing the browser cache or using incognito mode can sometimes help.
If the router is frozen with the red indicator on:
- Disconnect the device from the power supply.
- Remove the SIM card and memory card.
- Press and hold the power button (or the WPS/Reset button, depending on the modification) and, while holding it, connect the USB.
- Try to run the flashing or unlocking procedure again.
⚠️ Attention: If you see a reference to "Bootrom mode" in the model request or in the program logs, or the device is detected as "Android Bootloader," this means the main firmware is corrupted. Recovery in this case is only possible using special engineering methods (UART), which require soldering contacts on the board.
Configuring the router after flashing the firmware
After successfully unlocking and flashing the firmware, the device is ready to work with any carrier. However, for stable internet access, we recommend performing a basic setup. Access the web interface at 192.168.8.1If you changed the administrator password during the firmware process, use the new one (often by default this is admin).
In Network Settings, create a new APN profile for your carrier. The settings are usually filled in automatically, but if not, find the current APN parameters on your provider's website. For example, for Tele2, it's internet.tele2.ru, for MTS - internet.mts.ruSave the profile and select it as active.
It's also recommended to change your Wi-Fi network password and network name (SSID) to unique ones to prevent neighbors from using your data. In the "Wi-Fi Settings" section, set the security type. WPA2-PSK and create a strong password. After completing all the settings, reboot your device using the "System" → "Reboot" menu to ensure all settings have been saved and applied correctly.
Is it possible to flash Huawei E5573Cs without a computer?
Unfortunately, a full firmware update or SIM lock removal is impossible without a PC. Huawei's mobile apps (HiLink) only allow you to configure network settings but do not have access to system memory partitions to install new firmware. A Windows computer is required.
Will the warranty be voided after flashing?
Yes, tampering with the software and removing carrier locks officially voids the manufacturer's warranty. If your device is under warranty, it's best to contact a mobile phone store for official unlocking, if your contract allows it.
What is the best firmware for E5573Cs?
There's no "best" firmware for everyone. The most stable firmware is the original firmware version the device came with, but unlocked. Upgrading to newer versions (for example, from R001 to R005) can add features, but can sometimes reduce performance or connection stability. It's recommended to look for firmware marked "Generic" or "Unlocked."
What should I do if the router asks for a PUK code after flashing the firmware?
The PUK code has nothing to do with the router firmware. It's the unlock code for the SIM card itself if you've repeatedly entered the incorrect PIN. You should find it on the plastic card that came with the SIM card or in your operator account. Reflashing the router won't help.