Why Xiaomi is not catching the Internet: a full analysis of the problems

The situation when the flagship or budget smartphone Xiaomi suddenly ceases to maintain a stable network, familiar to many owners: you are in the zone of confident reception, the operator promises high speed, but the 4G indicator treacherously flashes, and pages in the browser load forever. The problem with communication on Redmi and POCO devices can be caused by a software failure, incorrect settings of the access point, or even the features of the MIUI and HyperOS shell.

Often, users sin on hardware, believing that the antenna inside the case malfunctioned or damaged the radio module after a fall. However, in the vast majority of cases, it is a problem of software conflicts or the wrong configuration of network protocols. Before carrying the gadget into the service, it is worthwhile to conduct a comprehensive diagnosis yourself, which will save time and money, since many errors are corrected in a few minutes through hidden menus or reset parameters.

In this article, we will discuss in detail why Xiaomi is not catching the Internet well, and propose a step-by-step algorithm for restoring a stable connection, we will touch on both software aspects and physical factors that influence the signal.

Diagnostics of signal level and frequency ranges

The first step to solving the problem is to understand what exactly is happening to your device’s radio module. The standard stick indicator on the screen is often misleading, as it only shows the approximate strength of the signal, but not its quality or the load of the tower. To get accurate data, you need to consult the Android engineering menu. Go to Settings → About Phone → All specs → Processor (or just open the “ringer”) and type in the command ##4636#.

In the menu that opens, select Phone Information. Here you will see the actual value of the signal in dBm. The normal indicator is the range from -50 to -80 dBm. If the value drops below -100 dBm (for example, -115 or -120), then the weak signal is a hardware problem or a consequence of a strong distance from the base station, in which case software dancing with a drum may not help.

You can also force the network type to switch from this menu. Sometimes the 5G/4G/3G/2G automatic mode is incorrect, constantly trying to catch unstable 5G where its coverage is leaky. Fixing on LTE Only or WCDMA/GSM can stabilize the connection in areas with poor coverage.

⚠️ Attention: When choosing a regime «LTE Only" you may lose the ability to accept incoming voice calls if your carrier does not support VoLTE technology. Use this mode only for Internet distribution or testing, remembering to return the settings back to the back.

Physical obstacles are important to consider, too. Metal structures, thick walls, even dense tree foliage can shield the signal. If one room has a phone that catches the network perfectly and another room doesn't, the problem is probably the architecture of the room, not the smartphone.

APN Access Point Settings: Hidden Source of Problems

One of the most common reasons why Xiaomi does not catch the Internet at full signal level is the incorrect settings of the access point (APN). Communication operators periodically change the parameters of their gateways, and if your profile is written old data or they are lost after updating the system, the data rate may drop to zero. → SIM-maps and mobile networks → Access points (APN).

Here, it is important to pay attention to the fields “Name” and “APN”: they must strictly correspond to the data of your operator (for example, Internet.mts.ru or Internet.beeline.ru). The presence of unnecessary spaces, the wrong register of letters or specifying the wrong type of protocol (for example, IPv6 instead of IPv4) can block the mobile Internet.

Sometimes it helps to create a new access point with custom parameters. DNS. Use of public use DNS-servers from Google or Cloudflare can speed up the response of the network and bypass some of the limitations of the provider. APN need to prescribe DNS 1: 8.8.8.8 and DNS 2: 8.8.4.4.

💡

After changing the APN settings, be sure to restart your smartphone or turn on flight mode for 10 seconds so that the communication module restarts with the new settings.

For most Russian operators, PAP or CHAP is the best choice, but in some regions providers require strict compliance with the type specified in their technical documentation.

Impact of MIUI and HyperOS Updates on Communication Module

Xiaomi owners know that every major shell update is a lottery. The company’s engineers are constantly optimizing the system, but sometimes new versions of MIUI or HyperOS contain bugs that destabilize the radio module. Users often notice that after an update, the phone begins to “lose” the network, discharges faster in standby mode or switches between towers for a long time.

The problem may be a driver conflict. If you upgrade from Android 12 to 13 or 14, the old configuration files can interfere with the new software. In such cases, a full reset of network settings helps. Go to Settings → Connections and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. This action will remove all stored Wi-Fi passwords and associated devices, but return the network settings to a factory look.

It is also worth checking whether the traffic saving mode or the “Smart Mode” for the SIM-Some versions of the firmware have a feature that shuts down mobile internet when Wi-Fi is connected, even if the latter does not have access to the global network, which creates the illusion of a missing Internet.

⚠️ Warning: If the problem started right after installing the firmware beta, don't wait for fixes. Return to a stable branch via the Mi Flash Tool or the wait may take months and the battery will run out in a matter of hours.

Sometimes cleaning up the cache of Google Play system services and Xiaomi services helps. Accumulated debris in system processes can cause time synchronization and geolocation failures, which indirectly affects the choice of base station.

Wi-Fi problems: frequency conflicts and routers

If mobile internet is working fine and Xiaomi's Wi-Fi is catching poorly, the reason is often in frequency bands. Most modern routers operate in the 2.4 GHz and 5 GHz bands. The 2.4 GHz range is more long-range, but is heavily noisy by neighbouring routers and microwaves. The 5 GHz range is faster but worse at breaking through walls.

Xiaomi smartphones sometimes aggressively try to switch to a faster channel, even if the signal is weaker there, which leads to permanent connection breaks. The solution is to go to the router settings and lock the channel or divide the networks (give different names for 2.4 and 5 GHz) so that the phone connects to the desired one. In the Wi-Fi settings on the phone, it is also worth turning off the Wi-Fi Assistant feature, which automatically switches you to mobile Internet when a weak Wi-Fi signal is weak, which can be perceived as a cliff.

Another common problem is static IP-Address: If the router or phone settings are static IP, If you have a problem with another device on the network, the Internet will be intermittent. Make sure that the smartphone has the Wi-Fi settings to pick up the receiver. IP down DHCP.

For advanced users, it will be useful to change MAC-The device address is random (the feature is available in Android 10)+). Some older routers are not working properly with new randomization standards MAC-Addresses, which leads to constant disconnection of Xiaomi from the network.

Physical factors and condition SIM-map

Do not discount the banal physical reasons. SIM-The card is a chip that wears out over time, and the contacts oxidize, the plastic becomes deformed, and the software part becomes obsolete. 5-7 It may not work properly with modern networks. 4G/LTE, Even if the phone is new, the replacement. SIM-cards for a new in the cabin operator often does wonders.

Also important is the size of the SIM card. If you cut a card from large format to Nano-SIM with scissors yourself, you could damage the contact pad or disrupt the geometry of the chip. In a slot, such a card can sit loose, causing loss of contact at the slightest impact or vibration. Use only the correct-sized cards carved by a professional puncher.

The protective case is another hidden enemy of the signal. Metallized covers, magnetic latch cases, or too thick rubber cases can shield antennas located around the perimeter of the case. Remove the case and check the signal level - if it grows, the problem is found.

Radical measures and engineering solutions

If standard methods didn't work, you can try deeper settings. In the engineering menu (#4636###), there's a tab called "Radio Information." Here you can try resetting the radio with the "Turn off radio" button and turning it back on, which restarts the modem without restarting the phone.

For power users, it is possible to change region through Settings → Additional settings → Region. Sometimes changing region to India or the USA changes antenna algorithms and frequency ranges, which in some cases improves reception, but this can affect the operation of system applications and advertising.

In extreme cases, if nothing helps, it is still a flashing device. Using a global firmware version instead of a Chinese or regional one can solve the problems with the frequencies supported by your operator. Chinese versions of Xiaomi often do not support some LTE bands (Band 7, Band 20), popular in Europe and Russia, which leads to poor reception in buildings.

💡

The most common reason for bad Internet on Xiaomi is not a breakdown, but a software conflict of settings APN obsolete SIM-A card that does not support modern encryption protocols.

Frequently Asked Questions (FAQ)