Slow internet on a modern smartphone is not just an annoyance, but a real obstacle to productive work and comfortable leisure. Owners of Xiaomi, Redmi and POCO devices often face a situation where the operator’s declared 4G or 5G speeds do not correspond to reality, and pages load with a delay even when the signal scale is fully filled. The problem is not always in the coverage of the provider, often the root of the evil lies in the software settings of the MIUI or HyperOS operating system itself.
Understanding how the communication module works in conjunction with the software allows you to manually adjust the connection settings. You don't need to be a telecommunications engineer to apply several effective methods that are often ignored by standard system algorithms. We will discuss specific steps, from resetting network settings to working with the DNS-servers, which will help stabilize the connection.
Before we go into complex manipulations, we need to eliminate the banal physical limitations. SIM-If you use a case with metal inserts or magnetic elements, remove it for the duration of the tests, as they can shield the antenna. Physical interference often causes unstable ping in games and video call breaks.
Basic diagnostics and resetting of network parameters
The first step should always be to check the current status of the connection and eliminate temporary software failures. Android OS accumulates a cache of network connections, which over time may contain erroneous data or conflict with new base station settings. A simple restart of the device often solves the problem, but a deeper cleaning requires resetting the network settings.
This procedure will not delete your personal files, contacts or photos, but will return all the parameters of Wi-Fi, Bluetooth and mobile data to factory values. You will have to re-enter passwords from wireless networks, but this is necessary for potential configuration conflicts. Once the reset is performed, the phone will re-register in the operator's network, receiving the latest settings.
To perform the reset, go to the Settings menu → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth. Choose yours SIM-You can check the card and confirm the action. APN (Access points will also return to default, which in some cases already solves the problem of slow Internet if previously incorrect changes were made.
⚠️ Before resetting, make sure you remember passwords from important Wi-Fi networks, as it will be impossible to recover them from your phone’s memory after the procedure without re-entering them.
Optimizing the settings of the APN access point
An access point (APN) is a gateway between your device and the ISP network. Often operators provide standard settings that are not optimal for current tower loading or a particular type of traffic. Manual protocol adjustment can significantly reduce ping and increase throughput.
To change the settings, go to Settings. → SIM-maps and mobile networks → Choose. SIM → Access points (APN). Press the "New Access Point" button or edit the existing active one. The key here is choosing the right protocol. In most cases, switching from the "New Access Point" to the "Access Point" button. IPv4 on IPv4/IPv6 or the use of specific DNS inside APN speed-up.
In the APN type field, make sure that you write the default,supl. If the field is empty, write it manually. It is also worth experimenting with the APN protocol field by setting the IPv4/IPv6 value. Some users note the positive effect when changing the Authentication Type field to PAP or CHAP, although this is not critical for most modern networks.
☑️ Checking settings APN
After making the changes, be sure to save your profile and switch mobile Internet to and from Avia mode so that the changes take effect. If the speed does not change, try creating a completely new access point with an arbitrary name and copy only the necessary parameters from the operator, eliminating unnecessary fields that could be added by third-party applications.
Use of alternatives DNS-server
Standard. DNS-Your mobile operator’s servers are often overloaded or slow to process requests, leading to a long wait for the page to load (TTFB). Replacing them with public and fast servers from large tech companies can speed up network response and sometimes bypass blockings that slow traffic.
In modern versions MIUI Android (starting with version 9) has a built-in “Private” feature. DNS» (Private DNS). She's encrypting. DNS-requests, preventing them from being intercepted and replaced, and often speeds up the resolution of domain names. → Connection and sharing → Private DNS.
Select the Private DNS Host Name mode and enter the address of one of the fast services. The most stable and fast options at the moment are:
- 🚀 dns.google – Google servers that provide high speed and reliability.
- 🛡️ security.cloudflare-dns.com – protection against malicious sites and high performance from Cloudflare.
- ⚡ 1dot1dot1dot1.cloudflare-dns.com — Cloudflare alternative address focused on speed.
After saving your settings, reboot your phone. You will notice that pages start to “drawn” faster, especially those that contain a lot of ad trackers. However, it is worth considering that in rare cases, using certain DNSs can lead to the inability to access the operator’s resources (for example, personal account), so if you have problems, just return the setting to Auto mode.
Does DNS affect the speed of downloading files?
Hidden engineering menus and network mode selection
Xiaomi smartphones have a hidden engineering menu that allows you to control the radio module at a deeper level, with which you can force the phone to 4G (LTE) mode, preventing it from “rolling” into unstable 3G or 2G in areas of uncertain reception, where the speed drops to a minimum.
To enter the menu, dial the phone app code ##4636##. If the code is not working, your firmware version may block this access, and then you will need to install a special activator application from the Play Market store.
Find the option "Tune your preferred network type." It's often the default choice. Try changing the value to LTE Only (Only) LTE). This will make the module hold onto the towers. 4G even with a weak signal, which often gives a more stable, although not the fastest Internet than the constant reconnection between the two. 3G and 4G.
| Network mode | Description | Impact on speed |
|---|---|---|
| LTE Only | Only 4G networks. | Stable ping, but possible dead zones without communication |
| NR/LTE/GSM | 5G/4G/2G (Auto) | Maximum speed where there is 5G, but higher battery consumption |
| WCDMA Only | Only 3G. | Low speed, used as a backup option in the wilderness |
| GSM Only | Only 2G (Edge) | Very slow, just for calls and text. |
Use of the regime LTE Only is especially relevant in transport or places where the signal "jumps." However, remember that in this mode incoming calls may not pass if the operator does not support VoLTE technology. → SIM-maps and mobile networks → Use VoLTE and activate the switch.
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Forced switching to LTE Only mode eliminates delays caused by constant network search, but can deprive you of voice communication in areas without 4G coverage if VoLTE is not enabled.
Disabling the MIUI optimization function
MIUI is known for aggressively optimizing applications and network connections to save battery life. Network Speed Optimization is designed to analyze and speed up connections, but in practice it often works the other way around: it puts additional strain on the processor and delays packet transfers.
To turn off this mechanism, go to Settings → Wi-Fi → Wi-Fi Assistant (or “Wi-Fi Assistant”). Find the Network Acceleration or Network Speed Optimization switch and turn it off. In some firmware versions, this setting may be duplicated under the Mobile Internet section.
Also, check the energy saving settings for the specific applications you use most often (browsers, messengers, navigators). Go to Settings → Apps → All Apps → [Select App] → Battery and set the No Limits mode. This will prevent the system from putting the network module of the application into the background.
⚠️ Warning: Disabling system optimization may slightly increase battery consumption, as the phone will no longer aggressively limit background network activity.
Additionally, check whether the Traffic Limit or Traffic Saving feature is enabled in the mobile networking section. If it is active, the system will artificially limit the speed and background loading of content after reaching a certain threshold or permanently if austerity is enabled.
Resetting and updating network components
Sometimes the problem lies in outdated modem drivers or conflicts after a firmware update. In Xiaomi smartphones, the components of the radio module are updated along with the system, but there are cases when manual re-registration or resetting of the radio stack is required.
One effective method is to use a code to reset the radio module. In the phone app, type ##726633## (code may vary by model and region, sometimes running the ##4636## command followed by selecting the Run Ping Test for diagnosis). A more universal way - the reset command IMS:
##4636## → Phone Information → Turn off IMS StatusAfter the status is turned off IMS (If such item is available in your test menu) and subsequent turn on, the phone will be re-registered in the networks. VoLTE/VoWiFi, And remember to check periodically for system updates in the Settings menu. → The phone. → Version. MIUI, Security patches often fix network errors of specific operators.
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If you travel frequently, keep your profiles. APN different operators. SIM-You don’t have to search for the settings manually – just activate the desired saved profile in the access point menu.
Hardware restrictions and SIM-map
You should not discount the physical condition. SIM-Old cards issued 5-7 years ago, you may not be able to support modern encryption and frequency standards, which causes you to drop speed. If your SIMKE is many years old, contact the operator's salon for a free replacement with a supported card. 4G/5G and USIM-technology.
It's also important which slot the card is installed in. In Xiaomi's dual-symbol phones, the first slot is usually a priority for high-speed data. SIM-card, make sure that the card with the main Internet tariff is installed in Slot 1. In many models, the second slot can be limited to the standard 3G or have reduced bandwidth when two cards are simultaneously operated.
Check the integrity of the contacts on SIM-Oxidation or micro-scratches can cause packet loss. Wipe the contacts with soft cloth and make sure the card sits tightly in the tray. The luft tray can also cause short-term breaks in the connection when moving.