Why Xiaomi has a bad Internet: reasons and solutions

Owners of Xiaomi, Redmi and POCO devices often experience a smartphone suddenly losing download speed or completely breaking the connection to the network, and the problem can manifest itself in different ways: video buffers, pages in the browser do not open, and messengers hang in the status of “connection”, which is annoying, especially if the tariff plan allows you to use high-speed mobile Internet.

The reasons for the unstable operation of communication modules lie in both the software features of the MIUI or HyperOS shell and the physical characteristics of the antennas. Sometimes it is not the provider at all, but in downgraded power saving settings that aggressively limit the background operation of network services, Understanding the root of the problem is the first step to fix it.

In this article, we will discuss in detail the main factors affecting the quality of the connection, you will learn how to adjust the frequencies correctly, check the work. SIM-maps and optimize the system for stable operation in networks 4G Deep tuning often works wonders where a simple restart doesn't help.

Software failures and energy saving settings

One of the most common reasons Xiaomi is not catching well is because of aggressive battery optimization, which aims to save every percentage of its charge by artificially limiting the power consumption of communication modules, causing the Internet connection to break or become extremely slow when it is in standby mode or when applications are folded.

You may notice that notifications are late, and when you're using the screen, the speed is restored, which is a classic symptom of energy saving algorithms. There are hidden and explicit settings in the MIUI shell that you need to check, often by resetting the network settings or switching modems.

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Before changing your network system settings, make sure you have access to Wi-Fi so you don’t lose touch with the outside world during the setup process.

You should also look at the Internet Acceleration feature, which attempts to use both Wi-Fi and mobile, which is not working properly on some models, creating priority conflicts. If you see a 4G icon next to Wi-Fi, try turning it off in your Wi-Fi settings.

⚠️ Note: Resetting network settings will remove stored Wi-Fi passwords and paired Bluetooth devices. Write down important data in advance or make sure you remember passwords from home networks.

Problems with SIM-map and mobile operator

Physical condition SIM-The card and tray are critical for receiving the signal, and if the card has been in use for several years, it may have formed oxides or micro-scratched contacts, resulting in loss of contact with the smartphone's communication module. In such cases, the phone may periodically lose the network or switch to mode. 2G/3G.

It is also important to note that some of the older SIM-Cards do not support modern encryption and frequency standards 4G/LTE Operators are gradually upgrading their equipment, and the incompatibility of older chips is becoming more noticeable.

And remember APN settings, sometimes when you update your firmware or change your region, you get confused, make sure that the right protocol type is selected in your mobile network settings, and most of today's networks have LTE or IPv4/IPv6.

Frequency and network mode settings

Xiaomi smartphones have the option of manually selecting the preferred network type. The default is automatic mode, which does not always correctly switch between towers with different coverage. Forced on only 4G can improve stability, but deprive you of communication in areas where only 3G catches.

Access to advanced settings often requires the use of an engineering menu or special codes. However, the basic settings are available in the standard interface. → SIM-maps and mobile networks → The preferred type of network is the one that supports it. LTE.

Another important aspect is working with two SIM-When one card is engaged in conversation or active data exchange, the second card can go into standby mode. 2G. This is normal behavior for many modems, but on Xiaomi, it is sometimes implemented with delays. Try to turn off the second SIM card temporarily to see if the speed will increase on the main one.

The Impact of Wi-Fi Router and Ranges

If the problems are only observed when connecting to the home network, the reason may lie in the congestion of the 2.4 GHz band. This is the “old” range, which is used not only by Wi-Fi routers, but also by microwave ovens, Bluetooth headphones and neighboring networks.

Modern Xiaomi smartphones support the 5GHz band, which is less busy and provides higher data transfer speeds. However, it has a shorter range and it passes through walls worse. If your router is dual-band, be sure to connect the smartphone to the network with the end of 5G.

It is also worth checking the settings. DNS. Providers often provide their servers, which can run slowly.Replacement DNS Public from Google (8.8.8.8) or Cloudflare (1.1.1.1) in a particular network’s Wi-Fi settings can significantly speed up page response.

Hidden MIUI functions and system constraints

The MIUI shell has many features that the user may not be aware of, such as Flight Mode, which sometimes glitches and doesn't shut down the communication modules completely, but only puts them into an error state.

Another thing is traffic priority, and in Security -> Traffic, you can set restrictions for specific applications, and if you accidentally restrict background traffic to a browser or messenger, the Internet will not work on them, although in other applications everything will be fine. Check the listing applications.

Some firmware versions have a Smart Network Switching bug that sees a weak Wi-Fi network and thinks it's better to switch to mobile internet, but does so clumsily, creating gaps for a few seconds. Disabling this feature in Wi-Fi settings often stabilizes the connection.

⚠️ Warning: Do not install third-party Internet accelerator apps from the Play Market. 99% of the time, they only change the Internet. DNS or show advertising, and systemically can conflict with the work of the built-in modem.

Hardware malfunctions and antenna module

If software methods didn't work, it might be hardware, because antennas in modern smartphones are located around the perimeter of the body, and falls, impacts, or poor repairs could damage the plumes of the antennas or unstuck them from the body, in which case the signal level (RSSI) will be low even near the tower.

It is also worth checking the tray for SIM-If it is skewed or deformed, the card may not enter the connector fully, leading to poor contact. Try to correct the card carefully or use an adapter if the card is cut by hand.

In rare cases, the motherboard's communication module itself fails, often after moisture or severe heat, the diagnosis requires the device to be opened and the contacts vertebraed by a specialist, and if the phone is new and falls, this is a guarantee.

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If the signal level drops to zero when the body is bent or tapped on the back cover, the problem is almost certainly in the outgoing contact of the antenna.

Frequent Questions (FAQ)