How to improve Wi-Fi signal on a Xiaomi phone

Poor wireless reception on smartphones from a popular Chinese brand often irritates users. When videos are interrupted by buffering, and messages fail to send due to connection timeouts, urgent action is needed. Modern devices Xiaomi, running under shell control MIUI or HyperOS, have powerful communication modules, but software glitches or physical obstacles can reduce their effectiveness to a minimum.

In most cases, low speed or intermittent connection interruptions do not indicate a hardware problem. Often, the cause lies in incorrect power saving settings, outdated DNS configurations, or a simple software freeze in the communication module. Understanding how it works radio module your device will allow you to regain comfortable internet use without purchasing expensive equipment.

There's a comprehensive approach to solving this problem, starting with simple reboots and culminating in fine-tuning hidden engineering parameters. It's important to consistently eliminate factors affecting signal quality, moving from software errors to physical limitations. In this article, we'll examine all available optimization methods that can help stabilize the connection.

Diagnostics and initial reboot of modules

The first and most effective step in troubleshooting any network anomalies is a full device reboot. This doesn't just turn the screen off and on; it completely disables the device. radio module, clears accumulated errors in the driver cache and restarts the handshake procedure with the router. In the operating system Android processes can accumulate errors that prevent network interfaces from functioning correctly.

However, a standard phone reboot is sometimes insufficient if the problem lies with the signal source itself. Routers, especially budget models, often overheat or run out of RAM when a large number of connected clients are connected. It's recommended to unplug the router for 10-15 seconds to allow the capacitors to fully discharge, then plug it back in.

⚠️ Note: If your router has been running for more than 5 years without being replaced, its performance may have significantly decreased due to degradation of its electronic components. In this case, adjusting your phone's software settings may not produce the desired effect.

After rebooting both devices, check the signal strength. If it's still low, try disabling and re-enabling Wi-Fi through the control panel. To do this, pull down the notification shade and tap the wireless network icon until it disappears, then tap it again. This will force a scan of the airwaves and search for the most suitable access point.

Manage network profiles and reset settings

Sometimes the phone "remembers" a network with incorrect parameters that were relevant in the past, but are interfering now. XiaomiLike other manufacturers, it saves connection profiles, including encryption types and IP addresses. If the router has changed the channel or security settings, the old configuration on the phone may cause conflicts. You should remove the problematic network from the list of saved networks.

To do this, go to Settings → Wi-Fi, tap the arrow next to your network name and select "Delete this network" or "Forget network." Then, re-enter the password. This will force the phone to re-authorize and request the latest network settings. In some cases, resetting all network settings to factory defaults may help.

This operation will affect not only Wi-Fi, but also Bluetooth and mobile data settings, so be prepared to re-enter your wireless network passwords. This is a drastic but effective method that clears out junk from the system routing tables. The reset path is usually found in the menu. Settings → Connection and sharing → Reset Wi-Fi, mobile networks, and Bluetooth.

What happens when you reset networks?

Resetting network settings deletes all saved Wi-Fi passwords, paired Bluetooth devices, and VPN settings. Mobile data will continue to work, but APNs may be reset if your carrier hasn't configured them automatically. This is a secure operation and won't affect your personal photos or contacts.

After resetting, your phone will behave like a new device in terms of connections. This often solves issues where the phone sees the network but won't connect, or connects but the internet isn't working. Make sure you know the passwords for your networks before performing this procedure.

Optimizing MIUI and HyperOS settings

Shells from Xiaomi They're known for aggressive power optimization, which often throttles background processes, including Wi-Fi. The system may limit antenna power or disable the module when the screen goes dark, believing this to be power saving. To improve the signal, it's necessary to teach the system that a stable connection is more important than saving battery power.

First, you should disable the "Wi-Fi Assistant" feature. It's designed to automatically switch to mobile data if the Wi-Fi signal is weak. However, in practice, this algorithm often malfunctions, causing constant reconnections and delays. You can find this option in the Wi-Fi menu by tapping the three dots or the gear icon in the upper right corner.

⚠️ Note: The settings interface may differ depending on the version MIUI (12, 13, 14) or new HyperOSThe location of the switches may change when updating the system.

It's also worth checking your date and time settings. If they're incorrect, security certificates may not be validated, leading to connection errors even with a strong signal. Set automatic time synchronization via the network. Additionally, in the "Security" section or in the "Security" app (green icon), you can find an optimization tool that sometimes resets network services.

Keep in mind that your phone's case can block the signal, especially if it contains metal inserts or magnets. Remove the protective case and check for any changes in reception. Antennas in modern smartphones are located around the perimeter of the case, and any obstructions in these areas are critical.

Works with 2.4 GHz and 5 GHz frequencies

Modern routers and phones Xiaomi Support two main frequency bands: 2.4 GHz and 5 GHz. Each has its own advantages and disadvantages. The 2.4 GHz band has better wall penetration, but it's heavily congested with signals from neighboring routers, microwaves, and Bluetooth devices. This creates a "mess" of interference, which reduces actual speed.

The 5 GHz band offers significantly higher speeds and is less susceptible to interference, but its signal has difficulty penetrating solid walls and fades faster over distance. If your phone is far from the router or behind several walls, switching to 5 GHz may actually worsen the situation. However, in the same room as the router, 5 GHz will provide maximum performance.

It's recommended to separate networks in your router settings by giving them different names (SSIDs), for example, "Home_2.4" and "Home_5." Then, on your phone, force a connection to the network that provides the best results in your specific location. Automatic frequency selection ("Smart Connect") often works incorrectly, locking onto a fast but weak 5 GHz signal in places where 2.4 GHz would be more stable.

In the phone's engineering menu (discussed below), you can view the actual signal strength in dBm. For 2.4 GHz, a value of up to -70 dBm is considered normal, and for 5 GHz, up to -75 dBm. The closer the value is to zero (the smaller the minus sign), the better the signal.

Changing DNS and Static IP Address

A common cause of slow page loading even with a full signal strength is issues with the provider's DNS servers. The phone may take a long time to load a website, trying to resolve the domain name to an IP address. Changing the DNS to faster and more reliable servers, such as those from Google or Cloudflare, often works wonders.

To change DNS to Xiaomi Go to Wi-Fi settings, click on your network, and select "IP Settings." Switch the mode from DHCP to "Static." In the fields that appear, enter the gateway address (usually 192.168.1.1 or 192.168.0.1) and in the DNS 1 field, enter 8.8.8.8, and in DNS 2 - 1.1.1.1This will speed up network response.

Using a static IP address can also help if you have a large network and your router is distributing addresses incorrectly, causing conflicts. Give your phone an address outside the automatic DHCP range but within the same subnet. For example, if your router assigns IP addresses between 100 and 200, give your phone an address of 50.

After saving the settings, the network will reconnect. Check the website loading speed. If you experience problems accessing local resources (printers, NAS), you may need to reset your DNS settings to automatic, as some local domains may not resolve to public servers.

Engineering menu and hidden settings

Advanced users can access the engineering menu, where they can view detailed signal information and even try to change its priorities. On phones Xiaomi access to testing is often achieved through a set of codes ##6484## or ##4636## in the Phone app.

In the testing menu (CIT), you can find the "WiFi Test" or "WLAN Test" section. It displays the current signal strength in real time. This allows you to pinpoint the "dead zones" in your apartment. However, changing the transmitter parameters (Tx Power) in this menu on modern versions Android often blocked or requires root access.

⚠️ Caution: Use extreme caution in the engineering menu. Changing unknown parameters may result in unstable operation of the communication module or complete Wi-Fi failure. Do not change values ​​unless you are sure of their purpose.

There is also a command to reset the radio module: ##72786## (SCRTON). This resets network settings at the system level, similar to resetting through the menu but more thoroughly. Use it if standard methods fail.

Physical factors and router placement

The laws of physics cannot be ignored. A Wi-Fi signal is a radio wave that is reflected, absorbed, and scattered. Metal objects, mirrors, aquariums, and thick concrete walls with reinforcement are serious obstacles. A microwave oven operating at 2.4 GHz can completely jam the signal in the kitchen when turned on.

Router placement is key. The ideal location is in the center of the apartment, high up, and away from electronics. The router's antennas should be vertical. If the router is hidden in a weak electrical box or behind a TV, no phone, including high-end phones, should be used. Xiaomi, will not be able to provide a stable connection.

If relocating the router doesn't improve the situation, consider purchasing a Wi-Fi repeater or setting up a mesh system. A repeater receives the signal from the main router and transmits it further, expanding the coverage area. For large apartments, this is often the only viable solution.

How to correctly position router antennas?

Antennas emit a signal perpendicular to their axis. If the antenna points upward, the signal spreads laterally (horizontally). If the antenna is placed horizontally, the signal will travel up and down. For an apartment building, it's optimal to point the antennas vertically upward so that the signal spreads along the floor plane. If the router is dual-band, one antenna can be left vertical and the other slightly tilted to cover the different polarizations of devices.

Why is Wi-Fi slow at night?

In the evenings and at night, the load on communication channels increases as neighbors also begin to actively use the internet. There are only 13 channels in the 2.4 GHz band, and they overlap significantly. If your router is on a channel chosen by your neighbors, collisions and packet loss will occur. Manually selecting a free channel in the router settings or using the 5 GHz band can help.

Does updating Android affect Wi-Fi?

Yes, major system updates (such as upgrading from MIUI 12 to 13 or to HyperOS) often include new drivers for communication modules. Sometimes this improves stability, but sometimes the opposite happens—new bugs appear. If the problem started immediately after an update, it's worth waiting for a patch from the manufacturer or temporarily rolling back the system, if possible.

Can a virus interfere with Wi-Fi?

Theoretically, malware could consume traffic in the background or change network settings (DNS), redirecting you to phishing sites, which creates the illusion of internet problems. Xiaomi There's a powerful antivirus built in, but checking with third-party software (such as Malwarebytes or Kaspersky) wouldn't hurt if you notice any strange network activity.