Modern work and entertainment require a stable internet connection, and wireless network frequency is a key parameter. Many Rostelecom subscribers wonder how to find out the GHz their Wi-Fi router supports, as this directly impacts file download speeds and video call quality. In most cases, users are unaware that their device can operate in two bands simultaneously or switch between them.
Understanding the difference between standards 2.4 GHz And 5 GHz This is critical for properly setting up a home network. If you live in an apartment building where every floor is emitting dozens of signals, choosing the right band can increase your speed several times over. In this article, we'll cover in detail methods for determining your equipment's frequency, how to switch modes, and the operating features of various router models provided by your provider.
The frequency of a radio wave is not just a technical characteristic, but a factor that determines how well the signal will pass through walls and how much it will be susceptible to interference from neighboring devices. Dual-band routersDual Band, or Dual Band, is becoming the de facto standard, but not all subscribers know whether they have a second, faster channel activated. Let's figure out how to determine the capabilities of your equipment without in-depth technical knowledge.
Visual identification and marking of the device
The easiest and fastest way to understand what kind of equipment you are dealing with is to carefully examine the router case. Manufacturers such as Sagemcom, Sercomm or HuaweiKey specifications are often printed directly on the manufacturer's information sticker, which is usually located on the bottom of the device. Look for markings like "AC," "Dual Band," or explicitly indicating the frequency range "2.4G/5G."
If there is a logo on the case Wi-Fi 5 or Wi-Fi 6, this is guaranteed to mean support for the 5 GHz band. Older standards, labeled as 802.11n or simply Wi-Fi 4, most often operate exclusively in the crowded 2.4 GHz band, although there are exceptions among advanced previous-generation models. The presence of antennas can also indicate the device type: models with four or more antennas are more often dual-band, while compact devices with one or two antennas are often budget-friendly.
⚠️ Please note: The router's appearance may vary depending on the year and batch number. Even if the model appears identical, the internal components and supported standards may differ. Always check the exact model (Model/Part Number) against the official specifications on the manufacturer's website.
For accurate identification, it is best to find the full model code, for example, Sagemcom [email protected] 3804 or Sercomm RV6699, and enter it into a search engine. This will give you a 100% guarantee of understanding the technical capabilities of your equipment, as visual indicators can sometimes be misleading, especially if the router has been repainted or some information on the sticker has been erased.
Analyzing the list of available Wi-Fi networks
Another effective method that doesn't require accessing your router's settings is to analyze the list of wireless networks available for connection from your smartphone or laptop. Rostelecom dual-band routers often broadcast two separate networks by default, each with the same name but different suffixes. For example, if your network is called "HomeWiFi," the second network might be called "HomeWiFi_5G" or "HomeWiFi_2G."
Pay attention to the security standard and connection speed displayed when attempting to connect. 5 GHz networks often use more modern encryption protocols and display potentially higher connection speeds in the operating system interface. If you only see one network and are close to the router, but the speed is slow, your device may have automatically connected to the slower 2.4 GHz band, ignoring the faster one.
- 📡 Look for networks ending in "_5G" or "_5GHz" in the list of available connections.
- 📱 On Android smartphones, tapping the Wi-Fi icon often displays the frequency of the current connection (for example, 2412 MHz or 5180 MHz).
- 💻 In Windows, you can see detailed information about the channel by hovering over the network icon or in the connection properties.
- 🔍 The absence of networks labeled 5G does not always mean that they do not exist - perhaps the name is hidden or the bands are combined.
It is worth noting that some providers and equipment manufacturers are implementing the technology Smart Connect or "Smart Switching." In this mode, the router broadcasts a single network name (SSID) for both bands and automatically decides which frequency to connect to based on signal strength and channel load. In this case, visually determining the frequency from the network list is impossible; a deeper analysis through the settings is required.
Checking via the router's web interface
The most reliable way to find out the exact frequency configuration is to log into the router's control panel. To do this, open a browser and enter the device's IP address into the address bar. By default, Rostelecom equipment usually has the IP address 192.168.1.1 or 192.168.0.1The address may also be indicated on a sticker on the bottom of the device, along with the login and password.
After logging in (the default credentials are often admin/admin or admin/password from the sticker), you need to find the section responsible for the wireless network. It may be named differently in different manufacturers' interfaces: Wi-Fi, Wireless, Wireless network or WLANThis is where the answer to the question about supported frequencies lies. If the menu has separate tabs or subsections for 2.4G and 5G, then your router is dual-band.
In the wireless network settings, look for the "Operating Mode" or "Standard" option. For the 2.4 GHz band, the values will be listed there. 802.11b/g/n, and for 5 GHz - 802.11ac or axIf you see the option to select a channel from a wide list (for example, 36, 40, 44, 48, and above 100), this is a clear sign that you are operating in the 5 GHz band, as there are only 13 channels available in the 2.4 GHz band.
☑️ Checking router settings
Interfaces of modern Rostelecom routers, such as Sagemcom Fast 2804 v7 or Sercomm, often have a graphical display of network status. On the main page ("Dashboard" or "Status"), there may be a "Wi-Fi Clients" or "Wireless Network" section that shows which bands are active. If the "Enable 5 GHz" slider or checkbox is active and green, that means that frequency is available for use.
Diagnostics using operating system tools
If access to your router is limited or you're away from it, you can use your operating system's built-in diagnostic tools. In Windows, this can be done via the command line or the detailed network properties window. This method allows you to find out not only the supported frequency of the router but also the frequency at which your device is currently connected.
For Windows 10 and 11 users, there's a convenient way via the command line. Open the terminal (cmd) and enter the command netsh wlan show interfacesIn the resulting report, find the "Channel" line. If the channel value is between 1 and 14, you're operating on the 2.4 GHz frequency. If the channel value is above 30 (e.g., 36, 40, 149), you're using the 5 GHz band.
netsh wlan show interfacesOn macOS, information is even easier to access. Hold down the key Option (Alt) and click on the Wi-Fi icon in the top menu. This will open an expanded menu, where the "Channel" line will show the current frequency and channel width. You can also use "Disk Utilities" or "System Report," where "Network" -> "Wi-Fi" will show PHY Mode (PHY mode), such as 802.11ac, which clearly indicates 5 GHz.
⚠️ Note: The frequency information in the operating system reflects the current connection. If your router is dual-band but you're far away from it, your phone or laptop may automatically switch to 2.4 GHz to maintain a stable connection, even if 5 GHz is technically supported.
Comparison of 2.4 GHz and 5 GHz frequency characteristics
Understanding the physical differences between the bands helps you choose the optimal network usage strategy. The 2.4 GHz band has a longer range and better wall penetration, but it's highly susceptible to interference from household appliances (microwaves, Bluetooth devices) and neighboring routers. Its maximum theoretical speed is limited, which can be critical for plans above 100 Mbps.
The 5 GHz band offers significantly higher data transfer rates and lower latency (ping), making it ideal for online gaming and 4K streaming. However, this signal has a shorter range and is less effective at penetrating solid walls and metal structures. This is why larger apartments or houses often require additional access points or mesh systems.
| Characteristic | 2.4 GHz band | 5 GHz band |
|---|---|---|
| Maximum speed | Up to 450-600 Mbps | Up to 1300-3000+ Mbps |
| Penetration ability | High (goes well through walls) | Low (fades over obstacles) |
| Interference level | High (many neighboring networks) | Low (free ether) |
| Range | Up to 50 meters (indoors) | Up to 20-30 meters (indoors) |
The choice of frequency depends on your needs. For a smart home, where devices (lamps, outlets) transmit small amounts of data and may be located far from the router, 2.4 GHz is ideal. For work laptops, gaming consoles, and TVs located in the same room as the router, 5 GHz is the undisputed leader.
Setting up and switching bands on Rostelecom routers
If you've verified that your router supports both bands but want to separate or combine them, you can do so in the settings. Log in to the web interface and go to Wi-Fi settings (or WLAN). Here you will see separate subsections for 2.4G and 5G.
To separate networks (so you can clearly see where you are connected), set different names (SSIDs). For example, MyHome_24 And MyHome_5GThis will allow you to manually select a fast network for your laptop and leave a slower, but longer-range network for IoT devices. Don't forget to save the settings by clicking "Apply" or "Save," after which the router may reboot the wireless module.
Some Rostelecom router models, especially newer ones, have network aggregation enabled by default. In this case, the interface will show a checkbox labeled "Combine 2.4 GHz and 5 GHz" or "Smart Connect." Unchecking this box enables separate management of two independent networks. This gives you complete control over which devices operate on which frequency.
What should I do if devices don't see 5 GHz after splitting networks?
If your smartphone or laptop no longer detects the 5 GHz network after separating the networks, it's possible that your region has restrictions on the use of certain channels (DFS). Try manually changing the 5 GHz channel in the settings to one of the base channels (36, 40, 44) and reducing the channel width to 40 or 80 MHz. Also, check if there's a region restriction (Country Code) in your router settings—it should be set to your region (RU or RF).
They simply won't see a network with a name containing "5G" in the list of available networks, even if the router is actively broadcasting it. This is normal equipment behavior.
Does router frequency affect mobile internet speed?
No, the Wi-Fi router frequency (2.4 or 5 GHz) only affects the data transfer speed between your device and the router via the wireless network. Mobile internet speed (4G/5G/LTE) depends on your mobile carrier, tower coverage, and data plan. However, if you use your smartphone as a hotspot, the frequency at which it broadcasts Wi-Fi will affect the data transfer speed to connected devices.
Is it possible to update a Rostelecom router to support 5 GHz?
No, firmware cannot add a physical radio module. If your model's specifications (for example, the older Sagemcom 2804) do not list 5 GHz support, it is not possible to "unlock" this feature. To operate at 5 GHz, you must upgrade your router to one that supports 802.11ac (Wi-Fi 5) or 802.11ax (Wi-Fi 6).
Why does the 5GHz speed drop when I move to another room?
This is a physical property of high-frequency waves. The 5 GHz signal has a shorter wavelength than 2.4 GHz, making it more vulnerable to absorption and reflection by obstacles. Walls, mirrors, aquariums, and even the human body can significantly weaken the 5 GHz signal. In such situations, the router may automatically switch the device to 2.4 GHz to maintain the connection, which you will notice as a drop in speed.
Do I need to change the password when separating 2.4 and 5 GHz networks?
If you separate networks (uncheck Smart Connect), you'll need to reconnect your devices to the new 5 GHz network. You can use the same password as for the main network or create a new one. Security (WPA2/WPA3) is configured separately for each band in the corresponding tabs of the router menu.