Owners of smartphones Xiaomi, Redmi and Poco often face a situation where the stated support for modern communication standards does not guarantee a stable data transfer speed. Mobile Internet can work unstable due to software failures, incorrect settings of the access point or the features of the MIUI and HyperOS shell. Unlike other manufacturers, Xiaomi devices have special engineering menus and hidden parameters that allow you to manually manage the communication module.
Before you blame the operator or buy a new gadget, it is worth conducting a comprehensive diagnostic of the software. Often the problem lies in the cache of network settings or choosing a suboptimal frequency of the radio module. Forced switching between modes. 3G/4G/LTE Through the engineering menu, we often solve the problem of “jumping” speed in areas of uncertain reception. In this guide, we will discuss proven optimization methods that will help you to get the most out of your connection.
Basic diagnostics and resetting network settings
The first step should always be a simple but effective procedure for rebooting the communication module. In the Android operating system, and in particular in the MIUI shell, background processes can block the normal operation of the radio part. Simply turning on and off the “flight mode” for 10-15 seconds causes the phone to re-register in the operator’s network, choosing the nearest and least loaded base station.
If a simple reboot fails, reset the network to factory values, which will remove stored Wi-Fi passwords and Bluetooth settings, but return the cellular configuration to factory status. → Connection and sharing → Resetting Wi-Fi, mobile networks and Bluetooth, which clears up errors in system configuration files.
It is important to understand that after a reset, you will have to re-enter passwords from wireless networks, but this is often necessary to resolve deep driver conflicts.In some cases, especially after a firmware update, old network profiles may conflict with new system libraries.
☑️ Checklist of primary diagnostics
After you do this, check the speed through Speedtest, and if the performance remains the same, the problem requires more in-depth intervention in the settings of the data protocols.
Manually configuring the APN access point
One of the most common causes of low mobile internet is the incorrect setting of the access point (APN). Operators automatically send settings, but they can be outdated or not optimized for modern high-speed tariffs.
To enter the settings menu, go on the Settings path → SIM-maps and mobile networks → Choose yours. SIM-map → Access points (APN). Here you'll see a list of available profiles. Don't delete existing records, but create a new one by clicking on the plus or the New Access Point button. In the Name field, type in any name, such as FastInternet, and in the Access Point field (APN)» enter the address specified on the official website of your operator (for example, Internet.mts.ru for MTS or Internet.beeline.ru for Beeline).
Secret APN settings for acceleration
Pay special attention to the APN type field. default,supl. It is recommended to expand this list to default,supl,hipri. The hipri option indicates to the Android system that this connection should be given priority over other background processes, which is especially important when using Internet distribution or heavy applications.
After entering all the parameters, be sure to save the profile and select it by setting the appropriate tick or radio button. Reboot the device so that the changes take effect.
Engineering menu and LTE frequency selection
Smartphone owners with Qualcomm and MediaTek processors (which is true for most Xiaomi models) have access to a hidden engineering menu, a powerful tool that allows you to control the radio module at a low level, and with it you can prevent the phone from switching to slow. 3G or 2G, making him hold on to the signal 4G/LTE even at its weakest level.
To log in to the menu, dial ##4636## in the “ringer” code. If the code is not working (on newer versions of MIUI access is often closed), you will need to install the Activity Launcher app from Google Play and find an activity there called Testing or Phone Information. In the menu that opens, find the section “Set preferred network type”.
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Forced switching to LTE Only or LTE/TD-SCDMA mode can dramatically improve speed in thick-walled buildings, where the phone is constantly jumping between communication standards.
Be careful: selecting LTE Only mode may cause regular voice calls to stop coming (unless the carrier supports VoLTE), as the phone will stop seeing the 2G and 3G networks used for voice communication in some regions.
The ideal option is often to choose LTE/WCDMA/GSM (auto connect) or similar combined mode, but with a priority on LTE. This will allow the phone to use fast Internet, but in the absence of 4G still switch to 3G for calls.
| Network mode | Description | Impact on speed |
|---|---|---|
| GSM only | Only 2G networks. | Very low (up to 237 Kbps) |
| WCDMA only | Only 3G networks. | Medium (up to 42 Mbps) |
| LTE only | Only 4G networks. | High, but the calls may not work. |
| LTE/WCDMA/GSM | Automatic choice | Optimal balance of speed and communication |
Using these settings requires understanding the signal reception conditions in your location. If you are in a zone of confident 4G reception, fixing on LTE will give you better ping in games and stability of video communication.
Optimization of DNS and Private DNS
Often the problem with slow internet is not channel speed, but the long response of domain name servers (DNS). When you enter the address of the site, the phone asks DNS-server IP-Standard carrier servers can run slowly or block some resources. DNS Google or Cloudflare can speed up page loading.
Android 9 and newer (including all modern Xiaomi) has a built-in “Private” feature. DNS-server (Private) DNS). She's encrypting. DNS-requests and allows you to bypass the limitations of the provider. → Connection and sharing → Private DNS-server.
Select the option “Host Name of the DNS provider” and enter the address of one of the fast services.
- 🌐 Google’s dns.google servers are highly stable.
- ⚡ 1dot1dot1dot1.cloudflare-dns.com — Cloudflare servers often provide minimal ping.
- 🛡️ dns.adguard.com – servers that also block ads in apps and browsers.
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Once Private DNS is enabled, be sure to restart your phone. Some bank applications may not work properly with encrypted DNS, in which case the function can be temporarily disabled.
After settings, the speed of opening heavy sites and content portals can increase significantly, especially for users whose operators practice throttling (artificial understatement of speed) of certain services.
Resetting statistics and cleaning the modem cache
Android has accumulated traffic usage statistics that can sometimes contain errors that affect traffic prioritization, and there are hidden codes to reset modem statistics that can help diagnose, but the most effective method is to completely reset the network settings we talked about at the beginning, but there are softer measures.
Try clearing the cache of the system application Settings and Google Play Services. Go to Settings → Apps → All Apps, find Settings, go to Memory and click Clear Cache. Do the same for Google Play Services. This will not delete your data, but update the temporary files responsible for network services.
⚠️ Warning: Don't use third-party Internet accelerators from the Play Market. 99% of the time, they just change. DNS Or they show ads, and their background work only consumes battery and processor resources, slowing down the phone.
It’s also worth checking if you have a back-end restriction for important apps. In the settings of each program (like Telegram or YouTube) under Mobile Data, make sure that the “No Limits” or “Background Mode” option is enabled if you want to receive notifications without delay.
Hardware factors and SIM-map
You cannot discount your physical condition. SIM-maps and antennas, if your SIMKE is more 5-7 In the past, its contact area may have oxidized and its internal memory may have degraded, leading to login errors and loss of data packets. 4G/USIM — This service is often free.
Also important is the case: Metallic cases or magnetic-latch cases can shield the antenna module of the Xiaomi smartphone, which is often located at the top or bottom of the case. Take off the case and check the speed: if it grew, then the problem was in the signal shielding.
In dual-symphones, there is sometimes a decrease in speed on one of the SIM cards, if both are in mode. 4G. In the mobile network settings, try switching the second SIM-map in “Only” mode 2G/3G» (If it's only used for calls, it will free up the radio module for the main SIM card that the Internet runs through.
⚠️ Note: If the Internet is only slow in certain places after all the manipulations (home, office), the problem may be overloading the operator’s tower, in which case software methods will not help – just waiting for the operator to upgrade the networks or using Wi-Fi.
Integrated approach – from replacement SIM-maps before fine-tuning DNS And the engineering menu, which fixes 90 percent of the speed problems, and if it doesn't work, there may be a hardware defect in the antenna module that requires a diagnosis at the service center.