Modern smartphones Xiaomi And Redmi They are equipped with advanced wireless modules capable of operating in two frequency bands. However, users often encounter a situation where the device "doesn't see" the high-speed 5 GHz network, even though the router is broadcasting it. This can be caused by both regional software restrictions and incorrect router settings.
Enabling this range significantly increases data transfer speeds and reduces interference in apartment buildings. In this article, we'll explore the technical details of the modules' operation. Wi-Fi, methods for forced activation of the range and methods for diagnosing connection problems.
It's worth noting that not all budget models support 5 GHz at the hardware level. Before setting up, make sure your device is technically capable of working with this communication standard.
Technical features of the 2.4 and 5 GHz bands
The 2.4 GHz band is the most common, but often overcrowded. It's used not only by neighbors' routers, but also by Bluetooth devices, microwave ovens, and wireless mice. This creates a high level of noise, which reduces the actual connection speed.
The 5 GHz band offers wider channels and is less susceptible to interference. Smartphones Xiaomi, supporting the standard 802.11ac or Wi-Fi 6, can achieve gigabit speeds near the router. However, this range has a significant drawback: poorer penetration through walls.
Hardware frequency support depends on the communication module installed in the phone. Flagship models, such as the series Xiaomi Mi or Xiaomi 13/14, usually have full support for both ranges. In budget models of the series Redmi or POCO sometimes there are restrictions.
⚠️ Attention: If your model's specifications only indicate "Wi-Fi 802.11 b/g/n", then you won't be able to enable 5 GHz using any software methods.
Checking router compatibility and settings
Before changing your phone's settings, you need to make sure your access point is working properly. Often, the problem lies in the router broadcasting a 5 GHz network with parameters that the smartphone doesn't support. Xiaomi perceives as incompatible.
First, check the channel width. Many older or budget Wi-Fi modules in phones cannot work with 80 MHz or 160 MHz channel widths if they are configured in a non-standard mode. It is recommended to set the channel width to 20/40/80 MHz or force selection 40 MHz for testing.
The second important parameter is the security standard. The encryption protocol WPA3 may not be supported by some versions of MIUI or HyperOS on older devices. Try switching the protection to WPA2-PSK (AES).
| Parameter | Recommended value | Impact on Xiaomi |
|---|---|---|
| Channel width | 40 MHz or 80 MHz | Instability at 160 MHz |
| Channel type | 36, 40, 44, 48 | Some channels may be blocked |
| Opening hours | 802.11 a/n/ac mixed | Ensures maximum compatibility |
| DFS | Disabled (for testing) | The phone may ignore DFS channels |
It's also worth paying attention to the DFS (Dynamic Frequency Selection) feature. If the router uses channels reserved for radar (DFS channels), the smartphone may not display this network in the list of available networks until it receives a special signal from the access point.
Setting the region in the engineering menu
One of the most common reasons for the lack of 5 GHz networks is software restrictions in the region. Different countries have different legally permitted frequency ranges. If your smartphone Xiaomi locked to a region where certain 5 GHz channels are prohibited, it will simply filter them out.
Changing regional settings often requires access to the engineering menu. This is a hidden section of the system intended for developers and testers. It is accessed through the standard Phone app.
Enter the dialer code ##6484## or ##4636##The interface may differ depending on the version. MIUIFind the section related to WiFi or RegionHere you can try changing the region to "United States" or "Indonesia," which allow more channels.
Risks of using the engineering menu
Changing settings in the engineering menu may cause the communication module to malfunction. Remember the original parameter values so you can easily restore them.
After changing the region, you must completely reboot the device. Simply turning off the screen isn't enough; a full reboot is required. RebootIf the network appears after rebooting, then the problem was precisely with the software frequency blocking.
⚠️ Note: The engineering menu interface may differ on different Android versions. Do not change any settings you don't understand, except for region settings.
Using third-party applications for activation
If you can't change the region using the built-in tools, you can use specialized software from Google Play. Applications like WiFi Analyzer or WiFi Man They can't directly turn on the module, but they help diagnose whether the device sees a physical signal.
There are utilities that require Root rights, which can force changes to regional codes in system configuration files. An example would be changing the file country_code in the section /data/misc/wifi/However, this method is only suitable for experienced users.
For non-rooted devices, you can try network reset apps. They clear the network profile cache and can force a rescan of all available frequencies.
It's important to understand that no app can bypass the processor's hardware limitations. If the phone's chipset doesn't support 5 GHz, software hacks won't help.
Reset network settings and update software
Often, a simple network settings reset solves the problem. This doesn't delete your personal files, photos, or contacts, but it does erase all saved Wi-Fi passwords, Bluetooth settings, and mobile network settings.
To perform a reset, go to the menu Settings → Connection and sharing → Reset Wi-Fi, mobile networks, and BluetoothConfirm the action and wait for the communication modules to reboot. After that, try searching for the network again.
☑️ Checklist before resetting settings
It's also worth checking for operating system updates. Engineers Xiaomi Patches are regularly released to fix Wi-Fi module errors. Go to Settings → About phone and click on the shell version.
If you're using a global firmware on a Chinese device (or vice versa), driver conflicts may occur. In such cases, updating the firmware to the official version for your region helps.
Diagnostics via ADB and command line
For advanced users, a diagnostic method is available via USB debugging. By connecting the phone to the computer and installing ADB (Android Debug Bridge), you can get detailed information about the status of the Wi-Fi module.
Use the command adb shell dumpsys wifito display a detailed log of the wireless interface. In the output, look for the lines mFrequency or mChannelThis will show what frequency the current connection is operating on.
adb shell cmd wifi status
adb shell dumpsys wifi | grep "5GHz"
You can also try to force a scan via the terminal on the device itself (requires a terminal emulator or ADB):
svc wifi disablesleep 2
svc wifi enable
This method allows you to reset the Wi-Fi driver without completely rebooting your smartphone. Sometimes, this helps reconnect to the 5 GHz network if it disappears from the list after waking up from sleep mode.
⚠️ Note: ADB commands require USB debugging to be enabled in the Developer Options menu. Be careful when entering commands to avoid damaging system files.
Frequently Asked Questions (FAQ)
Why does my Xiaomi see the 5 GHz network at home, but not at the office?
Most likely, your office router is configured to use channels that are restricted in the region set on your phone, or it's using a non-standard channel width. It may also be broadcasting a hidden SSID.
Does the case affect 5GHz signal reception?
Yes, metal cases or cases with magnetic mounts can shield the signal. Since 5 GHz has poorer penetration through obstacles, even a dense silicone and metal case can completely block the network.
Is it possible to share 5GHz Wi-Fi from a Xiaomi phone?
Yes, most modern models support the 5 GHz access point function. The setting is in Settings → Wi-Fi Hotspot → Access Point Settings → AP Band.
Why is the speed on 5 GHz slower than on 2.4 GHz?
This can occur with a very weak signal. At long distances, 5 GHz loses speed more quickly. An older router that doesn't support the AC standard or radar interference (DFS) can also be the cause.