The situation when a flagship smartphone Xiaomi or Redmi Many users are familiar with the sudden drop in internet speed or slow loading of pages in a strong reception area. Device owners often blame the ISP or router, forgetting that the software MIUI or HyperOS has its own energy-saving and network management algorithms that can aggressively limit background activity and bandwidth.
In this guide, we'll cover not only standard range switching, but also lesser-known optimization methods accessible through hidden engineering menus and fine-grained system settings. The key factor affecting speed in 90% of cases on Xiaomi is not a physical antenna failure, but a conflict between IPv6 protocols and static DNS addresses. Understanding these nuances will allow you to get the most out of your equipment without buying new gadgets.
Before moving on to complex manipulations, it's necessary to conduct basic diagnostics to rule out external factors. We'll look at how to correctly interpret connection data and which parameters should be changed first for a stable connection. Wi-Fi connections.
Diagnosing the current connection and selecting a range
The first step should always be checking the exact band your smartphone operates on. Modern routers often broadcast two networks: 2.4 GHz and 5 GHz. 2.4 GHz It has a long range, but it is extremely congested in apartment buildings, where every neighbor's router, microwave, and Bluetooth headset creates a "mess" of interference.
In contrast, the range 5 GHz It provides significantly higher data transfer rates and is less susceptible to interference, but has a shorter range and is less effective at penetrating solid walls. On devices Xiaomi The "Smart Network Selection" feature is often enabled, which can mistakenly switch the phone to the slow 2.4 GHz band in order to "save power," even if the 5 GHz signal is stable.
- 📡 Open your Wi-Fi settings and check if you are connected to a network with a "5G" or similar prefix.
- ⚙️ Go to
Settings → Wi-Fi → Wi-Fi Assistantand turn off the "Select best network automatically" option if it's causing you to jump between bands. - 📶 Use apps like Wi-Fi Analyzer from Google Play to see the channel load in your apartment.
⚠️ Attention: If your router combines both bands into a single network (Smart Connect), your phone may select the wrong frequency. We recommend separating the networks in your router settings by giving them different names, such as "Home" and "Home_5G."
To force a switch to a fast band, sometimes it's enough to simply forget the slow network and connect to the fast one, after deleting the password-saving profile. This will clear the cache of negotiated parameters that may have been set incorrectly during the initial connection.
Optimizing DNS and Network Settings on Android
One of the most effective measures to speed up network response is changing DNS servers. Providers often use their own DNS servers, which can be slow or susceptible to filtering. Replacing them with public and fast servers Google or Cloudflare can significantly reduce page loading times, even if the overall bandwidth remains unchanged.
In modern versions of Android, including those that are on Xiaomi 13, Xiaomi 14 and newer, configuration is done via protocol Private DNSThis is a more advanced method than IP address encoding in older versions of Android, as it encrypts requests and prevents them from being intercepted.
To configure, go to the menu Settings → Connection and Sharing → Private DNSHere you need to select the option “Private DNS provider hostname” and enter the address, for example, dns.google or 1dot1dot1dot1.cloudflare-dns.comAfter saving, the system will reconnect to the network, and requests will begin to be processed faster.
If you're using older devices or prefer a static IP address, you can manually enter DNS in the advanced settings of your current network. To do this, click the gear icon next to your network name, select "IP Settings" → "Static," and enter your preferred addresses in the DNS 1 and DNS 2 fields.
Reset network settings and manage power savings
Aggressive energy conservation policy MIUI And HyperOS Often becomes a hidden enemy of a stable internet connection. The system can throttle background Wi-Fi processes to save battery life, leading to connection drops or a drop in speed when the screen is off.
To eliminate this factor, you need to configure battery behavior for system services. Go to Settings → Apps → All apps, click on the three dots in the corner, select "Show system" and find the "Wi-Fi" or "Google Play Services" process.
- 🔋 Select "Battery saving" and set it to "No restrictions".
- 🚫 Turn off Remote Control or Memory Cleaner for network services in the Security app.
- 🔄 Reset network settings:
Settings → Connection and sharing → Reset Wi-Fi, mobile networks, and Bluetooth.
Resetting network settings is a drastic, but often necessary, step. It deletes all saved Wi-Fi passwords, Bluetooth pairings, and mobile network settings, returning the network stack to its "out of the box" state. This eliminates accumulated software errors and configuration file conflicts.
☑️ Checklist before resetting the network
⚠️ Attention: After resetting your network settings, you'll have to re-enter passwords for all Wi-Fi networks. Make sure you have access to them, especially if they're corporate networks with complex authentication.
Using the engineering menu and hidden functions
For advanced users Xiaomi Provides access to the engineering menu, where you can fine-tune the radio module's parameters. Access to the menu is accomplished by entering a special code in the dialer: ##6484## or ##4636##Codes may vary depending on the firmware version and region.
In the Testing menu, you can find the "Wi-Fi performance" or "Radio Info" section. Here, you can sometimes find the option to force the standard selection (802.11 b/g/n/ac/ax). If your router supports Wi-Fi 6 (ax), but the phone clings to the old standard, the speed will be limited.
This section also displays the signal level in dBm. Normal values are considered to be between -40 and -60 dBm. If you see values below -80 dBm, software tricks won't help—the problem lies in the physical location or obstructions.
Path to hidden settings (may vary):1. Dial ##4636##
2. Select "Wi-Fi performance"
3. Check "Throughput" and "RSSI"
Be careful when changing settings in the engineering menu. Incorrectly configured frequency ranges may result in the Wi-Fi module becoming completely inoperable until the device is rebooted or, in rare cases, the firmware is updated.
What to do if the code doesn't work?
On newer versions of HyperOS, access to the engineering menu via codes may be blocked. In this case, you can try installing the "Activity Launcher" app from the Play Market, finding "CIT" or "Testing" in the list of activities, and launching them directly.
Comparison of optimization methods
Not all methods are equally effective in all situations. Below is a table to help you choose a strategy based on your specific connection issue.
| Problem | Recommended method | Efficiency | Complexity |
|---|---|---|---|
| Slow download speed | Transition to 5 GHz | High | Low |
| Long page loading times | Changing DNS (Private DNS) | Medium/High | Low |
| Constant breaks | Reset network settings | High | Average |
| Unstable ping in games | Disabling energy saving | Average | Low |
Combining these methods yields the best results. For example, switching to 5 GHz, setting up fast DNS, and disabling power saving can significantly increase actual browsing speed.
It is also worth considering that some “accelerators” from the app store GetApps or Google Play They're just marketing. They often simply perform the same actions (clearing the cache, switching airplane mode) that you can do yourself, but they do it with intrusive advertising.
Hardware limitations and external factors
We can't forget about the hardware either. Budget models Redmi or POCO entry-level ones may have single-stream antennas (1x1 MIMO), while top-end ones Xiaomi They use 2x2 or 4x4 MIMO schemes. This is a physical limitation that cannot be circumvented by software.
Additionally, car mount cases with metal elements or magnetic rings can block the signal. Remove the case and check the speed—if it increases, you've found the problem.
⚠️ Attention: Settings interfaces may vary depending on the MIUI version (12, 13, 14) and HyperOS. If you can't find a specific option, use the settings search (the magnifying glass at the top of the settings screen).
In conclusion, Wi-Fi optimization on Xiaomi This is a complex process. Start with simple steps like selecting the 5 GHz band and changing the DNS, then move on to power saving settings. Only if that doesn't help should you resort to resetting the network or using the engineering menu.
Frequently Asked Questions (FAQ)
Why did my Wi-Fi speed drop after updating MIUI?
Firmware updates often reset user settings to defaults, which may not be optimal for your region. New OS versions may also contain bugs in the Wi-Fi module drivers. Try resetting your network settings after updating.
Does airplane mode affect Wi-Fi speed?
Briefly enabling airplane mode (for 5-10 seconds) helps reconnect to a base station or router with better settings if you've been moving. However, constantly using it won't speed up your internet.
Should I use accelerator apps?
In most cases, no. Built-in Android and MIUI features are more efficient. Third-party apps often just drain battery life and display ads, faking a "speed boost."
Can a virus slow down Wi-Fi?
Yes, malware can use your internet connection for mining or spamming in the background. Scan your device with the antivirus built into the Xiaomi Security app.