How to set up mobile Internet on Xiaomi: the complete guide

Modern smartphones of the Xiaomi brand are famous for their functionality, but sometimes users face situations when after replacement SIM-The Internet is lost, and this can happen for a variety of reasons, from a banal lack of coverage to incorrectly prescribed parameters of the access point of the provider. POCO It is often noticed that automatic settings do not always work correctly, especially when using virtual operators or regional SIM cards.

In this article, we will discuss in detail the process of manually configuring network parameters so that you can enjoy a stable connection anywhere. We will consider not only standard MIUI menus, but also hidden engineering capabilities, as well as methods for diagnosing problems with the communication module. Properly configuring mobile traffic is the key to fast operation of the navigator, messengers and streaming services.

Before you start complex manipulations, you need to make sure that the basic health of the equipment is not the software, but the physical contact or the status of the card itself is the problem. Make sure that your plan is active and there are funds in the account, as this is the first thing the operator checks when connecting.

Diagnostics and primary inspection of equipment

Begin troubleshooting (search for faults) with a physical check SIM-Remove the tray with a paper clip and carefully examine the contacts for oxidation or scratches. Dirt or fat from your fingers can prevent normal reading, so wipe the chip with a soft cloth. If the card is too old and cut out of the mini or micro format by hand, it is better to replace it in the cabin of the operator with a new version of nano-SIM.

The second important step is to check the slots’ settings. In some Xiaomi models, the first slot can be prioritized for voice and the second slot for data, or vice versa. Try moving the SIM card to another connector to prevent a particular reader from malfunctioning inside the device. Also make sure that the system settings select the correct default data slot.

And don't ignore the state of the antenna, because if the phone fell or was exposed to moisture, the antenna could have moved away from the contacts, so even if the signal level is full in the status bar, the Internet might not work. Check the network in flight mode: turn it on for 10 seconds, and then turn it off. This will force the communication module to restart and force the device to re-register in the operator's network.

⚠️ Note: If after removal SIM-Cards phone calls PUK-If you try to do this, you'll have to do it with a code, and you'll never enter random combinations, and if you try three wrong attempts, you'll have to lock the SIM card, which you can only restore from the operator.

For quick diagnosis, use the built-in MIUI tools. Go to the security section and run a speed test or network check. The system will tell you whether there are conflicting settings or traffic restrictions set earlier.

Manually configuring the APN access point

The most common reason for the lack of internet is the misconfiguration of the APN (Access Point Name) access point. Operators use these settings to route your traffic to their internal network. In modern smartphones, settings often come automatically as SMS, but if they do not, they must be manually prescribed.

To enter the settings menu, go on the Settings path → SIM-Maps and mobile networks. Select an active SIM card and find "Access Point Type" or "Access Points (APN)». In the list that opens, click the “New Access Point” button or the plus icon in the lower right corner of the screen. Here you will need to enter data that can be found on the official website of your operator.

Usually, only two fields are required: “Name” (any field, for example, MTS Internet) and “Access point» (APN). Other fields, such as proxy, port, username and password, are not required for Russian and European operators in most cases. MVNO-Operators may require this data.

After entering all the options, be sure to click the save menu (usually three dots in the corner or the button "More» → «Save. Then go back to the hotspot list and activate the one you created by putting a marker next to it. Without that step, the phone will continue to use the old, non-working settings.

⚠️ Note: When creating a new access point, do not use Cyrillic in the field "Access Point» (APN), if the operator does not explicitly specify such a requirement, the Latin letters provide better compatibility with network equipment.

In some cases, resetting APN settings to factory settings helps. In the access point menu, find the corresponding option in the menu (often hidden under three dots) and select Reset.This will remove all user changes and return standard profiles that may have been lost.

Selection of preferred network type

The quality and speed of the connection directly depend on the selected mode of operation of the radio module. → SIM-maps and mobile networks → The preferred network type can be selected by the user as a priority communication standard. 4G or 5G/4G/3G/2G (motor-car).

However, in areas of uncertain reception, automatic choice can lead to constant reconnections: the phone will try to “catch” 4G, lose the signal, fall to 3G, look for 4G again, and the Internet will work in snags. In such situations, it is advisable to manually switch to 3G only or 3G/2G mode to ensure a stable, albeit less fast connection.

There is also a hidden engineering menu that gives you deeper control over the radio module. To get into it, open the Phone app and dial the combination ##4636##. From the menu that opens, select Phone Information.

Phone Information → Set preferred network type

You can choose specific standards here, like LTE Only. This feature is useful if you're in a 4G confident reception zone, but the phone stubbornly clings to congested 3G. But remember: when choosing LTE Only, incoming calls may not pass if your carrier does not support VoLTE technology.

Experiment with modes depending on your location. In the subway or basement, it is often more profitable to forcefully leave 3G, so as not to waste battery power on the constant search for high-standard towers.

Comparison of parameters of communication operators

Different carriers use different access point addresses and protocols, and here is a table of the current APN settings for the main 4G/LTE carriers, which will help you quickly set up your Internet manually.

Please note that some corporate rates or special services (such as “Unlimited” or gaming packages) may require specific APN settings. In such cases, it is best to request current settings through the operator’s support team or on its official website.

When entering data, keep an eye on the register of letters. Although modern systems are often insensitive to the register in the APN field, tradition requires that addresses be entered in uppercase or lowercase letters exactly as indicated in the official documentation, a mistake in even one character can lead to the Internet not working.

Addressing common problems

If all settings are set correctly, but the Internet is not working, the problem can be hidden in software constraints. MIUI has a Traffic Saving feature that can block background applications or even the entire connection when you reach a limit. Check the settings in Settings → Connection and Sharing → Data Transfer → Statistics.

It is also worth checking the date and time, and mismatching system time with real time can cause security certificate errors, which can cause security certificate errors. HTTPS-Sites and many applications won't download content. Set up automatic time synchronization over the network.

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Periodically clear the cache of the Phone and Settings applications if there are persistent connection breaks, which helps to eliminate accumulated software errors in the communication module.

In rare cases, a complete reset of network settings helps. This action will delete all stored Wi-Fi passwords and Bluetooth pairs, but return the network settings to factory state. Path to function: Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth.

⚠️ Note: Resetting your network settings will not delete your personal files, photos or contacts, but you will have to re-enter passwords from all Wi-Fi networks you have previously connected to.

If nothing helps, there may be a problem on the operator's side, so call the support team and check if there are any scheduled work or locks on your room.

Optimization of speed and stability

For owners of advanced Xiaomi models with support for Carrier Aggregation, it is important to understand that speed depends not only on the APN settings, but also on the loading of the tower. During peak hours, the speed can drop regardless of the phone settings.

Use signal monitoring apps to find a golden dot in the room. Sometimes shifting your phone to the next one. 20-30 Centimeters or changing its orientation can significantly improve the indicator RSRP (the level of the received signal. The higher the indicator (closer to the 0, for example -80 dBm is better than -110 dBm, the more stable the Internet will be.

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Mobile internet stability is 90% dependent on the quality of coverage in your location and only 10% on your smartphone settings.

Don’t forget to update the device’s firmware. Xiaomi engineers regularly release updates containing patches for modems that improve compatibility with networks of different operators and fix connection errors.