A modern smartphone is impossible to imagine without high-speed mobile Internet. owners of Xiaomi devices often face a situation when after installing a new one. SIM-map or move to another area gadget switches toEDGE or 3G, Although the coverage area allows for the use of LTE. This can significantly slow down applications and page loading.
The reasons for this behavior can be several: from the banal lack of support for frequencies by the operator to the failed settings of the access point. In most cases, the problem is solved by simply activating the desired mode in the settings menu, but sometimes a deeper diagnosis is required. Below we will discuss in detail all the steps of enabling the fourth generation of communication on Redmi and Poco smartphones.
Before you start complex manipulations, make sure your SIM-The card supports the standard LTE And the plan includes high-speed Internet, and it's also important that the operator delivers a strong signal at your location. 4G. If the fare and coverage are all right, but the speed remains low, go to the following sections of the instructions.
LTE Support and Regional Limitations
The first step is to verify the hardware capability of the device to work on fourth-generation networks. Most modern Xiaomi models released after 2016 are equipped with modules that support LTE. However, there are nuances associated with global and Chinese versions of firmware. Global versions (Global ROM) usually have a full range of frequencies compatible with European and Russian operators.
Chinese versions (China) ROM) They may be limited in support of certain bands used by local carriers, for example, if the carrier uses mainly Band 20 and your phone does not have it, turn on the specification. 4G You can check the specifications on the official website of the manufacturer or through special applications like AIDA64.
Also, you should consider that in some regions, network settings can be blocked at the firmware level. If you purchased a device imported from China and reflashed it to the global version, make sure that the process went correctly. Incomplete firmware conversion sometimes leads to the disappearance of the network type selection point.
- 📱 Make sure your smartphone model technically supports the standard LTE in your region.
- 🌍 Check which version of the firmware is installed: Global, China or EEA.
- 📶 Find out what frequencies (Band) your carrier is working on.
⚠️ Note: When buying a smartphone with Chinese firmware through marketplaces, carefully study the list of supported frequencies (Bands), as the absence of Band 3 or Band 20 can make it easier to use the Internet. 4G rural.
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Use CellMapper or LTE Discovery to find out exactly what LTE frequencies your phone is catching in your current location and which ones your device supports.
4G activation via the standard menu
The easiest and most common way to switch the network mode is to use the standard Android settings menu adapted by the shell. MIUI HyperOS: This method works 90% of the time if you SIM-The interface may vary slightly depending on the version of the system, but the logic remains the same.
First you need to get into the management menu. SIM-Here, the user can not only choose the preferred network, but also assign the default card to transfer data, which is especially true for dual-symbol devices, where there is often confusion about the priority of the connection.
Follow the following steps:
1. Open the settings on the main screen.
2. Go to the section SIM-cards and mobile networks.
3. Choose the one you want. SIM-card (if two of them).
4. Click on Network Type or Preferred Network Type.
5. In the list, select Prefer LTE or 4G (recommended).
After selecting this option, the phone should restart the radio module.The network indicator at the top of the screen will change from 3G or H+ to 4G or LTE. If the icon appears but the Internet is not working, the traffic limit may have been exhausted or balance issues have arisen.
☑️ Incorporation algorithm 4G
In some cases, the system can automatically switch between 3G and 4G depending on the signal quality. To lock the connection strictly to LTE, sometimes you need to use an engineering menu, which will be discussed below. However, for everyday use, a standard setting "Prefer LTE" is enough, which allows the phone to choose the best available signal.
Access Point (APN) for different operators
Even if you choose a 4G network type, the Internet may not work due to incorrect access point (APN) settings. Operators require the exact name of the access point to authorize the subscriber in the data network, often these settings come automatically in the form of SMS, but sometimes they have to be entered manually.
To check or change the parameters APN, Go to the Settings path → SIM-maps and mobile networks → (Yours. SIM) → Access points (APN). Here you will see a list of available profiles. If the list is empty or the current profile is not working, create a new access point by clicking on the plus or the "New" button. APN".
The key is the APN field, which must be strictly in line with your operator's requirements, such as the Internet for Megafon, Internet.mts.ru for MTS, Internet.beeline.ru for Beeline, and the remaining fields, such as username and password, can often be left blank or filled in according to the operator's data.
| Operator. | APN (Access Point) | User name | Password. |
|---|---|---|---|
| MTS | internet.mts.ru | mts | mts |
| Beeline | internet.beeline.ru | beeline | beeline |
| Megaphone | internet | - | - |
| Tele2 | internet.tele2.ru | - | - |
After you have entered all the data, be sure to save the profile and activate it by ticking or selecting from the list. Without saving the changes, the settings will not apply, and the phone will continue to use the old, non-working settings. After that, it is recommended to turn on air mode for 10 seconds and turn it off to reconnect to the network.
What to do if the APN is not saved?
Using an engineering menu for forced LTE
If standard methods don't work and the phone is stuck with 3G, you can try forcefully switching the radio to LTE mode through an engineering menu, which gives you deeper access to the modem settings, but requires caution. Changing the wrong parameters can lead to loss of communication.
To enter the engineering menu on Xiaomi, a special code is used in the Phone app. Dial the combination ##4636##. If the code is entered correctly, a hidden test menu will open. Select Phone Information.
In the list that opens, find Set Preferred Network Type. In the drop-down list, select an option that contains LTE Only or LTE/TD-SCDMA/CDMA/EvDo/GSM/WCDMA. Selecting LTE Only mode will cause the phone to ignore 2G and 3G networks, which is useful in areas of unstable coverage where the device constantly “jumps” between standards.
⚠️ Attention: Regime "LTE Only" can make incoming and outgoing voice calls impossible if the operator does not support VoLTE technology.
Once you select the mode, the phone can lose the network for a few seconds. If the 4G icon appears in the status bar, then the manipulation was successful. To return to normal mode, simply restart the device or select the standard network preference mode from the same menu.
Resetting network settings and software updates
When software failures accumulate, even the right settings may not be applied correctly, and in such cases, a complete reset of mobile network settings is an effective solution, which will return all connection settings to factory values by removing stored Wi-Fi passwords and Bluetooth settings, but often solves LTE problems.
You can reset via the Settings menu → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. Confirm the action and wait for the process to be completed. After that, the phone will restart, and you will need to re-enter passwords from Wi-Fi networks.
Also the cause of problems with 4G There may be bugs in the operating system itself. Xiaomi regularly releases updates to fix bugs in communication modules. → The phone. → Version. MIUI/HyperOS. If a new version is available, it is recommended to install it by previously backing up the data.
- 🔄 Resetting network settings eliminates software profile conflicts.
- 📲 Firmware updates often contain patches for modems.
- 🗑️ Removal of old profiles APN Makes room for correct settings.
Frequent problems and their solution
Despite following all the instructions, users may encounter specific problems, such as a phone seeing 4G but the internet is down, or speeds significantly lower than the operator's stated speed, often due to a base station overload or using an old encryption standard.
Another common problem is disappearance. 4G This is typical of networks where VoLTE (Voice over) technology is not configured. LTE). In this case, the phone resets the connection to 3G It's a voice call, and it doesn't always come back quickly, and the solution is to support VoLTE on the part of the operator and include it in the settings. SIM-map.
If the phone doesn’t see the network at all 4G, Although other devices on the same network are working normally, it may be damaged. SIM-Try to wipe the chip of the card with a soft cloth or replace it with a soft cloth. SIM-card to new in the operator's cabin. 5-7 Years ago, they may not support modern encryption standards. LTE.
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If nothing helps, the problem can be physical: damage to the antenna module or plume after a fall requires contacting the service center.
In rare cases, manual network registration helps. To do this, turn off the operator's automatic choice on the Mobile Networks menu and wait for the list of available networks. Select your operator manually, which causes the phone to force registration on this network, ignoring the priorities of roaming or affiliate networks.