Modern Xiaomi, Redmi and POCO smartphones are equipped with advanced communication modules, but users often face unstable connections. Falling download speeds, video calls interruptions or the inability to send a message in the messenger can be caused by software failures or physical obstacles. Understanding the nature of the problem is the first step to solving it.
In this article, we will take a comprehensive approach to diagnosing and fixing network problems, learn how to properly adjust frequencies, change APN settings, and use hidden engineering menus to test antennas. Connection stability directly affects battery life and overall device performance.
Don't ignore the system's signals of poor coverage. Often, a simple reconfiguration or replacement is enough. SIM-We'll go through every method in detail, from simple reboots to deep system tuning.
Diagnostics of the problem: Wi-Fi or mobile data
Before you take any drastic measures, you need to pinpoint the source of the instability, and the problem can be in a particular router, a cell phone tower, or a smartphone, and localizing the malfunction will save you time and nerves.
If you only have Wi-Fi problems, try connecting another device to the same hotspot. If the Internet is stable, then it's your Xiaomi settings. If you're on mobile, check the signal strength in different locations.
⚠️ Note: If the network indicator is constantly jumping between 3G, 4G and LTE, This could indicate wear and tear. SIM-map or damage to the antenna module inside the device.
For the initial check, use the built-in diagnostic tools. Go to Settings → About Phone → All settings and click on the MIUI or HyperOS kernel version several times to see the detailed network status. It is also useful to compare speeds using specialized applications.
Basic Wi-Fi settings: frequencies and DHCP
One of the most common reasons for low speeds is operating in the congested 2.4 GHz band. Most modern routers support the 802.11ac or ax standard at 5 GHz, which provides much higher bandwidth.
To switch, log in to your Wi-Fi settings on your smartphone. If your router is broadcasting the same network with the same name for both frequencies, try splitting them in your router settings or manually selecting a network with a 5G name.
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Use Wi-Fi analyzer applications (such as Wi-Fi Analyzer) to find the least loaded channel and set it in the router settings manually.
You should also pay attention to the DNS settings. ISP's automated servers can be slow. Try to prescribe static addresses from Google or Cloudflare.
- 📶 Click on your network name in the Wi-Fi list.
- 📶 Select the Settings item IP and change with DHCP static.
- 📶 In the fields DNS 1 and DNS 2 enter the values of 8.8.8.8 and 1.1.1.1 respectively.
Once you save your settings, reconnect to the network, an action that often solves the problem of long page openings at full signal levels.
Configuring APN access points for mobile Internet
Access point parameters (APN) It determines how your smartphone connects to the operator's gateways. SIM-The hand-corrected card may enhance the signal and stabilize the ping.
To enter the settings menu, go on the Settings path → SIM-maps and mobile networks → Choose yours. SIM → Access points (APN). Here you'll see a list of profiles. Don't delete existing ones, create a new one by clicking on the plus in the corner of the screen.
☑️ Set-up of the new APN
In the fields "Name" and "Access Point (APN)" you need to enter your operator's data. For most regions of Russia and the CIS, the following values are relevant, but it is better to specify them on the official website:
| Operator. | APN (Access Point) | Type APN |
|---|---|---|
| MTS | internet.mts.ru | default,supl |
| Beeline | internet.beeline.ru | default,supl |
| Megafon | internet | default,supl |
| Tele2 | internet.tele2.ru | default,supl |
After filling in the fields, be sure to save the profile and activate it with a switch.Rebooting the device after this procedure is mandatory for the application of changes.
The secret parameter of MCC and MNC
Resetting network settings and re-registration in the system
Accumulation of errors in network protocols is a common reason why Xiaomi does not catch the Internet well after firmware updates. Network resets return all modules (Wi-Fi, Bluetooth, Mobile data) to factory status.
This procedure will not delete your personal files, contacts or apps. It will only clear saved Wi-Fi passwords and Bluetooth pairs. You can reset via the Settings menu → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth.
An alternative, deeper method is to use the engineering menu to re-register online. Type ##4636## in the call. Select "Phone Information."
- 📡 Find the drop-down list of "Preferred Network Type".
- 📡 Select a mode that meets your standard (for example, LTE Only for compulsory 4G).
- 📡 Wait. 10-15 seconds and return the value to "LTE/TD-SCDMA/UMTS/GSM" (auto-select).
⚠️ Attention: In mode LTE Only can stop incoming and outgoing calls if your carrier does not support VoLTE technology.
Work with engineering menu and frequency selection
A more slim radio module management tool is available for advanced users, and the Engineering menu allows you to disable specific bands that may be overloaded or missing in your region.
After logging in to ##4636## and selecting Phone Information, find the button Set up preferred LTE bands. Here you will see a list of available frequencies.
Turning off the rarely used frequencies (such as Band 20 or Band 38 if they are not caught in your area) can make the modem more active in searching for a stable signal at the main frequencies, which reduces switching time between towers and reduces battery consumption.
Be careful: if you don't set up correctly, you can lose your connection completely, remember your original state, or take a screenshot before you make a change, and if you lose your connection, just restart your device, the settings will reset.
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Forced switching to a specific tower or frequency is the most effective way to improve the Internet in the area of uncertain reception, but requires experimental selection.
Physical factors and hardware solutions
Physical obstacles cannot be discounted; thick walls, metal structures, and even aquariums significantly weaken the signal; cases with metal inserts or magnetic holders can also shield an antenna located at the top or bottom of the housing.
Check the status. SIM-If it's more than used. 3-5 In the years since, the contact area has been oxidized or erased, and in the salons, operators often change their contact area. SIM new-support 4G/5G free or for a nominal fee.
Also worth checking is whether the smartphone overheats. At high temperatures, the processor and modem can artificially reduce the power of radiation to protect components. Remove the case while charging or heavy tasks to improve heat sink.