How to amplify the Wi-Fi signal on Xiaomi devices: from smartphones to routers

Have you noticed that Xiaomi smartphone or router has become worse catch Wi-Fi? Pages load longer, video slows down, and connection is constantly cut? The problem of weak signal is familiar to many users, but not everyone knows that it can be solved without buying new equipment. In this article, we will discuss 10 proven ways to amplify the signal on Xiaomi devices – from basic settings to advanced technical solutions.

The reasons for a bad signal can range from a router’s misalignment to outdated smartphone drivers. We won’t offer obvious tips like “reset the router” — instead, focus on specific settings that have a real effect. For example, did you know that some Redmi and POCO models can manually set your preferred Wi-Fi range, while Mi Router routers hide a larger room amplification mode?

Important: All instructions are relevant for Xiaomi devices MIUI 12–14 and routers of the Mi Router series 3/4/AX. If you have a different model, check the compatibility of the settings in the menu of your device.

1. Optimization of Wi-Fi settings on Xiaomi smartphone

To start with, the simplest thing is that often a weak signal on a phone is not a router problem, but a missetting in the device itself. There are a few hidden parameters in MIUI that can significantly improve reception.

The first thing you should do is turn on Smart Wi-Fi mode, which automatically switches the smartphone between the 2.4 GHz and 5 GHz bands, choosing the most stable channel, to activate it:

1. Open the Settings. → Wi-Fi.
2. Tap on the name of your network (not on the switch!).
3. Select Additional Settings → Smart Wi-Fi.
4. Activate the slider.

If this mode doesn't work, try manually setting a range, like 5GHz passing through walls faster but worse, and 2.4GHz is more stable over a long distance.

• 📶 In the same tab Additional settings, find the Wi-Fi Range item.
• 🔄 Choose 2.4 GHz or 5 GHz only (experiment!).
• 🔍 If you don’t have an option, your smartphone doesn’t support manual switching.

⚠️ Attention: On some firmware POCO And Redmi, after manually selecting the range, the Internet may disappear, in which case, return the settings to the original state and try another way.

2. Set up Xiaomi router for maximum coverage

If the problem is not with the smartphone, but with the router itself, it’s time to optimize its settings. Mi Router routers (especially the AX1800, AX3000 and 4A Gigabit models) have hidden signal amplification functions that are disabled by default.

The first thing you need to do is update the firmware, and the manufacturer regularly releases patches that improve the stability of the connection, so that it can update itself.

1. Connect to the router via the Mi Wi-Fi app (download to Google Play or AppGallery).
2. Go to Settings → Update firmware.
3. If a new version is available, install it.

Next, adjust the transmission power. Most Xiaomi routers have it on the default average level.

• 📡 In the Mi Wi-Fi app, select Settings → Expert regime → Wi-Fi settings.
• 🔧 Find the Transmission Power (or TX Power).
• 📈 Set the value High or 100% (if there is a slider).

Also check the channel and the bandwidth. If the router is running on a loaded channel, the signal will be weak.

💡

If you have a 5GHz channel 165 in your area, use it – it is usually the freest and provides minimal interference.

3. Advanced settings for experienced users

If standard methods don’t work, it’s time to move to hidden features, for example, in Xiaomi routers you can activate Beamforming mode, a technology that focuses the signal towards connected devices, rather than dissipating it in all directions.

To enable Beamforming:

1. Connect to the router via the browser at 192.168.31.1 (username and password is usually admin).
2. Go to Advanced → Wireless → Wireless Settings.
3. Find Beamforming or Mu-MIMO options and activate them.
4. Save the settings and restart the router.

Another effective way is to change the region of the router, where some countries, like the United States, allow higher transmission power than Russia or Europe, to change the region:

1. Connect to the router via SSH (use PuTTY or Terminal).


2. Enter the command:




nvram set country_code=US




3. Save the settings:




nvram commit




4.Reboot the router:




reboot

⚠️ Attention: Changing the region may violate local communication regulations. Use this method at your own risk. In some cases, after a region change, the router may require a factory reset.

You can also try to turn off the power savings of Wi-Fi in your smartphone, which reduces battery consumption, but often impairs the stability of communication, to deactivate it:

• 🔋 Go to Settings. → Battery and productivity → Battery consumption management.
• 📱 Find the Wi-Fi app (or Settings) in the list.
• 🔄 Select the mode No restrictions.

4. Physical methods of signal amplification

Sometimes the problem is not the settings, but the physical obstacles, and concrete walls, metal structures, and even aquariums can weaken the signal.

Optimal placement of the router:

• 📍 Put the router in the center of the apartment – so the signal will be distributed evenly.
• 🚫 Avoid placing near microwaves, refrigerators and other devices that cause interference.
• ⬆️ Raise the router to a height of 1-1.5 meters (for example, on the shelf) – so the signal is less blocked by furniture.

Use of a repeater or Mesh system:

If the apartment is big or the walls are too thick, one router may not be enough.

• 🔄 Wi-Fi repeater (e.g. Xiaomi Mi Wi-Fi Repeater 2) – enhances the signal of the existing network.
• 🕸️ Mesh system (e.g. Xiaomi Mesh System) – multiple access points that work as a single network.

Homemade antennas:

If you have a router with removable antennas (for example, Mi Router 3G), you can replace them with more powerful antennas, you can do antennas with gain of 5-9 dBi. The main thing is to choose antennas with a RP-SMA connector that is compatible with Xiaomi.

5. Alternative firmware for Xiaomi routers

If the standard router firmware doesn't offer the flexibility you need, you can install custom firmware, like OpenWRT or Padavan, which allows you to fine-tune network settings, including transmission power and channel management.

Advantages of alternative firmware:

• 📈 Ability to increase transmission power to 200-300 MW (versus the standard 100 MW).
• 🔧 Flexible QoS (Traffic Prioritization).
• 🛡️ Improved protection against DDoS attacks.

However, there are risks:

• ⚠️ Loss of guarantee.
• 🔄 The ability to “brick” the router when installed incorrectly.
• 📡 Some functions (such as managing via Mi Home) may stop working.

If you decide to firmware, follow this instruction (on the example of Mi Router 3G):

Download the firmware Padavan for your model from the official website|Backup your current settings in Mi Wi-Fi|Connect the router to the computer via cable|Turn off firewall and antivirus on PC-->

1. Go to the router web interface (192.168.31.1).


2. In the "Firmware Update" section, download the downloaded file.




3. wait until the process is complete (don't turn off the power!).




4. After restarting, reset the router.

6.Diagnostics of signal problems

Before you take any radical measures, you have to diagnose exactly what the problem is. Here's how to do it.

Signal level check:

On Xiaomi smartphones, you can see the exact signal level in dBm (the closer to 0, the better):

1. Enter the dialer code ##4636##.
2. Select Wi-Fi Information.
3. See the signal level (for example, -60 dBm is a good signal, -80 dBm is a weak signal).

Channel load analysis:

Use applications like Wi-Fi Analyzer (available on Google Play) to see which channels are occupied by neighboring networks. If your router is running on the same channel as 5 other networks, that's a clear cause of the weak signal.

Speed test:

Do the test on the Speedtest website or in the Mi Wi-Fi app.

• 📉 If the speed on the cable is high, and on Wi-Fi is low - the problem in the settings of the wireless network.
• 📡 If the speed is low and cable - the fault of the provider or router.

💡

If the Wi-Fi speed drops only in certain areas of the apartment, the problem is coverage. If the signal is weak everywhere, check the settings of the router or provider.

7. Frequent errors that degrade the signal

Many users themselves degrade the signal without even knowing it.-5 Mistakes and how to avoid them:

1. Using an outdated 802.11n standard. If your router supports 802.11ac (Wi-Fi 5) or 802.11ax (Wi-Fi 6), but 802.11n is in the settings, you lose both speed and stability. Update the standard in the router settings.
2. Hiding the SSID network. Many people think that a hidden SSID protects against hacking, but in fact it only makes it harder to connect and can degrade the signal. Better use a strong password.
3. Use of the WEP-This outdated protocol is not only unreliable, it also slows down the network. WPA2-PSK or WPA3.
4. No Wi-Fi driver updates in your smartphone. Older versions of MIUI may have connection bugs. Update in Settings → About Phone → System Update.
5. Putting a router in a closet or behind a TV, metal and dense materials shield the signal, and even a wooden cabinet door can weaken the connection by 20 to 30 percent.

FAQ: Answers to Frequent Questions