How to Make a Sustainable Mobile Internet on Xiaomi: A Complete Guide

The problem of unstable connection on Xiaomi smartphones is familiar to many users: sudden switching from 4G to 3G, low page loading speeds and constant communication breaks during calls. Often device owners sin on the operator or poor coverage, forgetting that the software settings of the MIUI or HyperOS shell can significantly affect the operation of the radio module. Deep optimization of the system allows you to squeeze the maximum from the available signal even in low reception conditions.

In this article, we’ll explore the non-obvious methods that will help you make mobile Internet on a Xiaomi phone really fast and stable. You’ll learn how to set up access points correctly, choose the optimal communication standard, and use hidden engineering menus for diagnostics. The right configuration can work wonders, turning a slow E into a full-fledged LTE.

Before you start complex manipulations, you need to rule out the trivial physical causes of the bad signal. Make sure that the SIM card is not damaged and its contacts are cleared of oxides. If your SIM card is more than three years old, it makes sense to replace it in the operator’s cabin with a new one with support for modern encryption standards and frequencies.

Basic setting of APN access points

The most effective way to speed up the Internet is to manually adjust access points. APN. Operators often provide standard settings that may not be optimized for a specific region or smartphone model. To get to the desired menu, go to Settings path. → SIM-maps and mobile networks → Choose yours. SIM → Access points (APN).

In the list that opens, find the "New Access Point" button or create a duplicate of the current one. It is important to fill in the "Name" and "APN" fields correctly. For most operators (MTS, Beeline, MegaFon, Tele2), the APN name must match the operator's name in the lower case (for example, Internet.mts.ru).

Click on the three-dot menu or the More button and select APN Type. The default is default,supl. To activate accelerated media transfer and more stable ping in games, experts recommend adding the dun parameter. The bottom line should look like default,supl,dun. This allows you to use the phone as a modem without restrictions from the operator.

⚠️ Note: Do not change the authentication type to PAP, If your operator doesn't require it explicitly, leave the value. CHAP or PAP/CHAP, To avoid problems with authorization on the network.

After making all the changes, be sure to save the new access point and activate it by ticking the appropriate box. Reboot the device so that the changes take effect. If the speed has not changed, try removing all the old access points by leaving the one you just created.

Selection of preferred network type

The automatic network selection in Xiaomi smartphones sometimes works incorrectly, forcing the phone to cling to congested towers or use outdated standards. 2G/3G where available 4G. Forced priority LTE It helps to stabilize the connection. → SIM-maps and mobile networks → Preferred type of network.

If the standard menu doesn't have the right options, you can use the engineering menu. Type ##4636## in the phone book. Select "Phone Information" and find "Preferred Network Type" and select a value that contains LTE Only or LTE/TD-SCDMA.

However, the use of the regime"LTE Only' has its own risks. 4G, The communication will be completely lost and you will not be able to receive calls or SMS, Because voice traffic is on the network LTE It's transmitted through VoLTE technology, which is not available to all operators, so it's better to choose a combined mode for everyday use. LTE/WCDMA/GSM.

Also worth paying attention to is the "Use 5G" feature if your smartphone supports it. In an environment where the 5G signal is unstable, the phone will constantly jump between standards, leading to high ping and battery consumption, in which case it is advisable to force a switch to 4G.

Resetting network settings and re-registration

The accumulation of temporary files and errors in the operation of the communication module can lead to a decrease in Internet speed. Periodic resetting of network settings helps to clear the cache of connections and eliminate software conflicts. This procedure will not delete your personal data, but reset Wi-Fi passwords and Bluetooth settings.

To perform the reset, go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. Press Reset and confirm the action. After that, the phone will restart the radio module and re-register in the operator's network, selecting the most optimal base station.

Another effective method is to use flight mode, turn on the flight mode for 10-15 seconds, and then turn it off, which forcibly breaks the connection to the current tower and causes the phone to search for the signal again, a technique that is especially useful in a sharp drop in speed in motion.

⚠️ Note: After resetting your network settings, you will need to re-enter passwords from all Wi-Fi networks and re-address Bluetooth devices such as headphones and watches.

If the problem persists, try to remove it. SIM-So you can wipe the contacts with a soft cloth and put them back in, and physical contact plays an important role in the stability of data transmission, especially at high frequencies.

Use of hidden codes and engineering tests

For a deep signal quality diagnosis, you can use hidden Xiaomi tests. Enter the code ##6484## to get into the engineering menu. CIT. You can check the antennas and the communication modules. SIM-map or network to see the signal level in dBm.

The signal strength is measured in negative decibels. The closer the value is to zero, the better the signal. For example, -75 dBm is a great signal, -95 dBm is a medium signal, and -115 dBm and below is a very weak signal, at which the Internet will work slowly or unstable. With accurate numbers, you can determine whether moving around the room or changing the position of the phone helps.

There's also code ##4636##, which I mentioned earlier, but there's another useful tab called "Usage Statistics," which shows how long your phone has been on the 4G/5G network and how often the switches have been made, which helps you understand how stable the signal is in your location.

Some users are trying to change the region of the device in settings to access more frequent base station updates. However, this is a controversial method that can lead to unstable system operation.

Optimization of modem and frequency

Modern networks use many frequency bands. If your phone tries to work with everyone at once, this can lead to unnecessary switches and loss of data packets. In the engineering menu (code #4636##), you can try to limit the set of supported frequencies, leaving only those that are actively used by your operator in this region.

For example, in Russia, the main LTE frequencies are Band 3 (1800 MHz), Band 7 (2600 MHz) and Band 20 (800 MHz). If you are in a city, the Band 20 can often be turned off, since it is designed to cover large areas outside the city and has a low speed.

For advanced users, there is an option to use aggregator applications that control frequency switching, but on Xiaomi with a locked bootloader, this is difficult to do.

In Settings → About Phone → MIUI version (click 7 times) turn on Developer Mode. Then in Advanced Settings → For developers, find “Mobile Data is Always Active.” Enabling this feature allows the phone to switch faster between Wi-Fi and mobile Internet, which speeds up content loading.

The Impact of VPN and DNS on Speed

Often the reason for slow Internet are not network settings, but DNS-ISP servers that can respond slowly to requests. DNS faster servers (e.g. from Google or Cloudflare) can significantly speed up site openings.

In Android 9 and above, and current versions of MIUI, there is a "Private DNS" feature. Go to Settings → Connection and Sharing → Private DNS. Select "DNS Provider Host Name" and type in dns.google or 1dot1dot1dot1.cloudflare-dns.com.

Use of the VPN-And it also affects speed. VPN They're often overloaded and they cut the speed to a minimum. VPN Or use paid vetted services with servers nearby. VPN from Xiaomi (Mi) VPN) It can also slow down the connection when used actively.

⚠️ Note: When using third-party DNS-Some sites may stop opening if the provider blocks access to them on servers IP-address, and DNS-The server returns the correct IP. In this case, return the settings to automatic mode.

Hardware restrictions and covers

Physical factors can’t be discounted: Thick protective cases with metal inserts or magnetic rings for car holders can shield the antenna. The antennas in Xiaomi smartphones are often located around the perimeter of the case, and any overlapping of this area with metal worsens reception.

Try removing the cover and checking the signal level, and if it's 5-10 dBm up, it means the accessory was the problem, and it's also worth checking if the back cover has a metal plate or a thick layer of glue from the previous glass.

In rare cases, the problem lies in the communication module itself after falls or moisture. If none of the software methods worked, and on other devices of the same operator in the same location the Internet works perfectly, you may need hardware repair of the antenna module.

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Use Network Cell Info Lite to visualize cell towers, which will help you find the point in the apartment where the signal is strongest, and place the router there or be more often during important calls.

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A comprehensive approach to setting up – from replacement SIM-maps before editing APN — This allows you to improve the speed of the Internet on Xiaomi on average 30-40% without buying new equipment.

Frequently Asked Questions (FAQ)