The problem of low wireless speeds on Xiaomi smartphones is familiar to many users, especially in dense urban areas where the air is saturated with signals. Often device owners face a situation where the tariff plan allows you to get hundreds of megabits, but the real figures barely reach tens. This is not always the fault of the provider; often the reason lies in the specific settings of the MIUI or HyperOS operating system, which are set by default for energy saving, not maximum performance.
In this article, we'll take a comprehensive approach to this problem, from basic diagnostics to advanced optimization techniques, and you'll learn how to choose the right frequency, change the frequency. DNS-Understanding the principles of the radio module of your smartphone will allow you to squeeze the most out of existing equipment without buying expensive accessories.
Diagnostics of the current situation and analysis of interference
Before you make any changes to the configuration, you need to understand the real situation. Standard status bar signal indicators are often misleading, showing the full scale, but not reflecting the quality of the connection. For deep analysis, you should use specialized utilities such as Wi-Fi Analyzer or built-in engineer tools, which will show what channel your network is running on and how congested it is with neighboring routers.
One of the main reasons for the speed drop is interference, especially in the 2.4 GHz band. If you live in an apartment building, the air can be jammed with dozens of networks that create "porridge" from signals. In such conditions, the smartphone has to constantly double-check the data packets, which reduces the final throughput. It is important to determine whether there are free channels or to switch completely to another range.
⚠️ Warning: Don't blindly rely on accelerator apps from the Play Market. Many of them just dump cache. DNS or close background processes, which gives a temporary effect, but does not solve the problem of radio frequency interference.
It’s also worth checking whether Xiaomi’s system itself limits the background activity of applications using the Internet. Aggressive battery optimization can “strangle” the network stack, especially when the screen is off. Check the settings in the Battery and performance section to make sure that there are no limitations for mission-critical tasks.
Choosing the optimal frequency: 2.4 GHz vs. 5 GHz
Modern Xiaomi routers and smartphones support two main bands: the 2.4 GHz range has better wall penetration, but it is extremely narrow and susceptible to microwave ovens and Bluetooth devices. The maximum theoretical speed here rarely exceeds 150 Mbps in real conditions, which may not be enough for modern tasks.
The 5GHz range offers significantly wider channels and less interference, allowing for near-gigabit speeds. However, it has a significant drawback: the signal passes worse through the capital walls and fades quickly at a distance. If your router supports 802.11ac or ax (Wi-Fi 6), this should be the priority.
Owners of Xiaomi devices may encounter a Smart Network Choice feature that automatically switches the device between frequencies. Sometimes the algorithm works incorrectly, clinging to a weak 5 GHz signal instead of a stable 2.4 GHz, or vice versa. In such cases, it is recommended to manually divide the networks in the router settings, giving them different names (SSID) to have full control over the connection.
- 📶 2.4 GHz: Better for smart homes and devices located far from the router.
- 🚀 5GHz: Perfect for streaming 4K, Games and downloads of large files near the access point.
- 🏠 Obstacles: Concrete walls with rebar can completely block the 5 GHz signal.
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If your router is dual-band but distributes one network with a common name, try turning off the Smart Connect function in the router settings and setting different names for 2.4 and 5 GHz networks.
Configure DNS and network settings in MIUI
One of the most effective and safest measures to increase network responsiveness is to change the network. DNS-Servers. Providers often use their own servers. DNS, Switching to public servers from Google or Cloudflare allows you to speed up the resolution of domain names, which is especially noticeable when loading heavy pages with many elements.
Xiaomi smartphones with Android 9 and higher (and therefore all current MIUIs) can configure Private DNS at the system level, which will apply the settings to all Wi-Fi and mobile connections. To do this, go to Settings → Connection and Sharing → Private DNS. Manually entering the address allows you to use faster protocols.
| DNS Provider | Server address (Hostname) | Features |
|---|---|---|
| Google Public DNS | dns.google | High stability, global network |
| Cloudflare | 1.1.1.1 | One of the fastest in the world, a focus on privacy |
| Quad9 | dns.quad9.net | Blocking malicious domains |
| AdGuard DNS | dns.adguard.com | Blocking Advertising at the Network Level |
Also worth paying attention to IPv6 settings. Some providers are better optimized to work with this protocol, and turning it on can have a positive effect on speed. Check status can be in the Wi-Fi Settings menu → Click on the network name → IP Settings. If the provider does not support IPv6, switching to static IPv4 with prescribed DNS often gives an increase.
☑️ Checking network settings
Hidden functions and engineering menu
For advanced users, Xiaomi provides access to advanced settings through an engineering menu, a powerful tool that allows you to control the parameters of the radio module, which are hidden from the average user, but you need to treat it with extreme caution, since incorrect changes can lead to unstable communication.
To get to the menu, open the Phone app and dial the code ##6484## or ##4636##. In the Wi-Fi information section, you can see detailed statistics: signal strength (RSSI), link speed and number of retransmissions. Low RSSI (for example, below -80 dBm) indicates a bad reception that cannot be fixed software.
⚠️ Note: The engineering menu strongly discourages resetting the region (Region) to countries with less stringent radiation standards, which can lead to frequency conflicts with local operators and violation of legislation.
Another useful feature is network resetting. If you've tried all the methods but the speed isn't growing, you may have accumulated software debris or configuration conflict. Go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. This action will delete all saved passwords and settings, returning the network stack to its original state.
Optimizing the router for Xiaomi devices
Often the problem is not the phone, but the access point settings. Xiaomi smartphones are sensitive to encryption type and channel width. The outdated WPA/TKIP security protocol can limit connection speeds. It is recommended to use only WPA2/WPA3 with AES encryption.
Channel width is another critical parameter. For a 2.4 GHz band, the optimal width is 20 MHz, as 40 MHz in noisy air will bring more problems than good. For 5 GHz, safely set 80 MHz or even 160 MHz if your router and smartphone support Wi-Fi 6.
- 🔒 Encryption: Only use AES, avoid TKIP and Mixed modes.
- 📡 Channel: For 2.4 GHz, choose 1, 6 or 11 channels, they do not overlap.
- 🔄 Protocol: Make sure the mode is on 802.11n/ac/ax, Not legacy. b/g.
It’s also worth checking if the router is not enabled with QoS (Quality of Service) if it’s configured incorrectly, the router can prioritize traffic from other devices to the detriment of your smartphone.
The effect of channel width on stability
Impact of updates and power consumption
MIUI and HyperOS are known for their aggressive energy-saving policies, which can limit background network interface activity to extend battery life, and this is especially noticeable when the screen is off: downloads can stop or slow down.
To avoid this, look for the battery settings for the "No Limits" option for applications that need to run in the background (torrents, messengers, cloud storage). Also, in the developer menu (Settings → About Phone → 7 times click on the MIUI version), you can find the option "Always turn on mobile Internet." Its activation allows the phone to use the mobile network to accelerate if the Wi-Fi signal is weak.
Don’t forget to update your firmware. Xiaomi engineers regularly release patches that fix Wi-Fi driver errors. If you have a global firmware version installed, it sometimes makes sense to consider switching to the Chinese (CN) version, where new features and drivers arrive earlier, although this will require unlocking the bootloader.
⚠️ Note: Installation of custom cores or modified firmware to "speed up Wi-Fi" may lead to loss of warranty and unstable operation of the communication module.
In conclusion, increasing the speed of Wi-Fi on Xiaomi is a complex process: start by choosing the right frequency and DNS, check the settings of the router and then move on to the hidden parameters of the system.
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The most significant increase in speed gives the transition to the 5 GHz band and the change DNS-servers on Cloudflare or Google, and the other methods are of auxiliary nature.