Modern Xiaomi and Redmi smartphones have powerful communication modules that can provide high data transfer speeds, but often after buying a device or changing the device. SIM-Users are faced with the fact that the Internet is slow, limited by the standard 3G Or even E. This can happen for a variety of reasons, from the wrong operator settings to hidden firmware system constraints, to enjoy the speed of streaming video and fast loading pages, you need to competently configure your preferred network type.
In most cases, activating high-speed mode does not require complex manipulation of root rights. SIM-map 4G And if you need to, you can change the parameters of the access point, and ignoring those steps can cause the device to cling to towers with an outdated communication standard, even if it's being caught nearby. LTE.
In this guide, we will take you through all the steps of setting up, from the basic switches in the menu to advanced methods through the engineering menu, how to check the list of supported frequencies of your device and what to do if the 4G icon disappears after the system update.
Verification of support LTE and settings SIM-map
The first step should always be to diagnose the hardware and status of the SIM card. Not all old SIM cards, especially those released many years ago, work correctly with modern data standards. If your SIM card is over 5-7 years old, it makes sense to contact the operator's salon for a free replacement with a USIM-enabled card. Also make sure that your plan involves using fourth-generation networks, as some archival tariffs can block this mode at the operator level.
Next, you need to check the physical capabilities of the smartphone itself. Models designed for the Chinese market may have a stripped-down set of frequencies that are incompatible with the ranges of Russian or European operators. To find out what frequencies your device supports, you can use special applications from Google Play or enter an engineering code. Type in the dial # #4636# and go to the section "Phone Information".
In the menu that opens, find the option "Configure preferred network type." Here you will see a drop-down list of available modes. To work properly, you need to select the option that contains the labeling. LTE, for example,"LTE/TD-SCDMA/GSM" or"LTE/WCDMA/GSM". If there is no mention in the list LTE, It is possible that the program activated mode only for 2G/3G networking, which is often found in global firmware after some updates.
⚠️ Attention: When choosing a regime"LTE Only" in the engineering menu, the phone may stop seeing the network if there is no fourth-generation coverage in your area, which will make it impossible to make and receive calls.
Basic network type setup in MIUI
Standard shell interface MIUI or HyperOS provides convenient tools for managing mobile networks. To switch to maximum speed, go to Settings → SIM-Select the SIM card you want to access the Internet through, and find the "Preferred network type" option, and here the system will offer several options, among which you can choose "Preferred" 4G" or "preferred." LTE".
Sometimes, when you select this setting, you don't change immediately, and in this case, it helps to simply reboot the device or briefly turn on the flight mode, which causes the modem to re-register on the operator's network, scanning the available towers and choosing the optimal frequency, and if that didn't help, maybe the problem lies in the wrong settings of the APN access point.
It is important to note that on dual-symbol devices, 4G is usually given priority to only one card, in which case the second SIM card will work in 2G or 3G mode. Make sure that the mobile data settings select the SIM card on which the Internet packet is activated and which has the best coverage in your area.
☑️ Checking network settings
Manual setting of the access point (APN)
Often the cause of the Internet is the lack or incorrectness of the access point profile. Operators automatically send settings when they first register on the network, but sometimes this process fails. To fix the situation manually, go to the Settings path. → SIM-maps and mobile networks → (Yours. SIM) → Access points (APN). In the lower right corner, click the button "New access point" or the plus icon.
The key fields are "Name" and "Access Point (APN)". For most Russian operators, the remaining fields (login, password, authentication type) can be left blank or by default.
| Operator. | Name (Name) | Access Point (APN) | Type APN |
|---|---|---|---|
| MTS | mts internet | internet.mts.ru | default,supl |
| Beeline | Beeline Internet | internet.beeline.ru | default,supl |
| Megafon | Megafon Internet | internet | default,supl |
| Tele2 | Tele2 Internet | internet.tele2.ru | default,supl |
| Yota | Yota | internet.yota | default,supl |
Once you have entered all the data, be sure to click the menu (three dots or "More") and select "Save." Then go back to the list of access points and activate the profile you just created by putting a marker next to it. Without saving and activating, the changes will not take effect, and the phone will continue to use old or default settings.
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If the automatic settings don’t come, try inserting SIM-card to another smartphone for a short time - sometimes the profile is copied to the memory card itself SIM And pulling up in Xiaomi.
Using an engineering menu for forced LTE
If standard methods fail, you can use a deeper setup via the Android engineering menu, which allows you to force the modem to work only in a certain frequency range. To enter the menu, dial the combination ##4636##. If the code does not work, your firmware version may block access to this menu, and you will need to install a special application from the Play Market, for example, "Force LTE Only (4G/5G)".
In the interface that opens, select "Phone Information" 1" (For the first SIM card, find the drop-down list "Install preferred network type." Here you need to select the option that contains the word LTE. For maximum compatibility, it is better to choose mixed modes, for example,"LTE/TD-SCDMA/GSM (PRL)" plainly"LTE/GSM auto".
There is also a mode called "LTE Only" that completely disables the ability to switch to 3G and 2G. This is useful in areas with unstable signal, where the phone constantly "jumps" between standards, losing connection. However, remember that in this mode incoming calls may not pass if the operator does not support VoLTE technology.
What to do if the menu 4636 is empty or unavailable?
Problems with VoLTE and 4G calls
Voice over LTE technology allows voice conversations over a fourth-generation network without lowering the Internet speed to 3G during a call. On Xiaomi smartphones, support for this feature depends on three factors: operator support, availability of a feature in the phone's firmware and proper configuration. If after turning on 4G during a conversation, the Internet drops to "E" or "3G", then VoLTE is not activated.
You can check the status in the same engineering menu ##4636##. Find the "VoLTE Provisioned" or "Enable VoLTE" switch and activate it. On some global firmware, this item may be hidden. SIM-the card of the operator supporting the technology, provided that the system has the corresponding configuration file.
If the VoLTE icon or HD It doesn't appear in the status bar, try resetting the network settings. → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth.Please note that this action will remove saved passwords from Wi-Fi, but can solve registration problems in the Internet. IMS-operator.
⚠️ Warning: Forced VoLTE on unsupported devices or carriers may prevent you from making outbound calls. If calls are lost after this option is enabled, return the setting to its original state.
Diagnostics and reset network settings
When software failures accumulate, even the right settings may not work. In this case, a complete reset of network settings helps. This does not delete your personal files, contacts or applications, but returns all connection settings to factory. Go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth and confirm the action.
After the reboot, the phone will start looking for networks again. Make sure that 4G is chosen again in the mobile network settings. It's also worth checking if traffic saving mode or background limiter for system processes is turned on, although this rarely affects the type of network, but can slow down speeds.
If nothing helps, it may be hardware-related or firmware-specific, and users sometimes resort to flashing the device to a region where LTE is running out of the box (e.g. Global on India or Indonesia), but this requires unlocking the bootloader and carries risks.
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Network resets are a safe and effective way to eliminate software conflicts that interfere with the stable operation of 4G, without losing personal data.