How to Turn Only 4G on Xiaomi: Forced LTE Mode

Modern smartphones Xiaomi, Redmi and Poco have advanced communication modules, but in some situations the standard network selection algorithm works incorrectly. Often the device “clings” to congested 3G, ignoring the stable signal of the fourth generation, which leads to a drop in page load speed and interruption of video calls. Users are faced with the need to forcely fix LTE mode to ensure the smooth operation of the navigator or gaming applications.

The solution to this problem lies in the depths of Android system settings, which are hidden by default from the average user. Unlike many other brands, the MIUI shell and the new HyperOS allow you to access the engineering menu or special codes that change the priorities of the radio module. Forced switching to 4G (LTE Only) is available on most Xiaomi models through a hidden engineering menu called by the code # # #4636#. This action does not require obtaining superuser rights (Root), but requires careful choice of parameters.

In this article, we will discuss several methods of network fixation, from standard settings to the use of specialized commands. You will learn how to avoid the typical errors when the phone stops seeing the network after changing the parameters, and what alternatives exist if the standard codes are blocked by the operator or manufacturer. Understanding the principles of the radio module will help you to properly configure communication.

Why the phone doesn’t hold 4G and when forced fixation is needed

The situation where the indicator on the screen constantly jumps between 3G, H+ and 4G, is familiar to many smartphone owners, a phenomenon known as “ping-pong” networks, because the device tries to find the base station with the strongest signal, not considering its loading, as a result, the phone can switch to a distant 3G tower with one “stick” but stable connection, instead of holding a weak but fast LTE.

The problem is particularly acute in areas of insecure reception or carrier coverage, where Xiaomi algorithms can mistakenly prioritize voice (2G/3G) over data, especially if VoLTE is not configured. In such cases, manually installing LTE mode becomes the only way to save at least some Internet.

And also, forced fixation is good for battery power savings. Constantly looking for the best network makes the modem run to the limit, which leads to a quick discharge. By locking the device to one standard, you reduce the load on the antenna module. However, it is worth remembering that in some cases this can lead to a complete lack of communication if LTE coverage is not available at a particular point.

Checking settings SIM-maps and basic configuration

Before you go to complex engineering codes, you need to make sure that the basic settings are correct. Often the problem is solved by simply choosing the preferred network type in the standard menu. → SIM-maps and mobile networks and select the SIM card used.

In the window that opens, look for Preferred Network Type, and you should select Prefer LTE or 4G (recommended). If you select "3G preferably" or "2G only," the phone will not be able to physically switch to high speeds, even if the signal is excellent.

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Make sure yours is yours. SIM-card 4G. If you use an old simka cut out of a mini or micro format, it should be replaced in the cabin of the operator with a new one with support. LTE/USIM.

Also check if your carrier has activated VoLTE.This technology allows voice to be transmitted over a 4G network, eliminating the need to switch to 3G during an incoming or outgoing call. On Xiaomi smartphones, the VoLTE switch is often hidden or depends on the firmware region, but activating it is critical for connection stability.

If the standard settings don't work and the phone persistently resets the connection to 3G, we move to a deeper setup through the system testing menu, which is the next logical step in diagnosing communication problems.

Using the Engineering Menu to Select Network Mode

The most effective way to make Xiaomi work only in mode 4G — This is using a hidden test menu, built into the Android operating system, and it's available through a special application. USSD-Open the phone app and dial the combination ##4636##.

Once you have entered the last characters, the screen will automatically switch to the Testing menu. Select Phone Information. If you have two SIM cards, you may need to select a specific slot (Phone 0 or Phone 1).

⚠️ Note: In the list of options network do not select items marked «NR» or «5G», if your fare or locality does not support these standards, as this can lead to constant network search and discharge. 4G look for an option LTE Only.

Select LTE Only. Immediately after that, the link indicator at the top of the screen may blink, and the phone will reconnect to the network. If there is 4G coverage, the 4G or LTE icon should be fixed. Now the device ignores 2G and 3G towers, operating exclusively in high-speed mode.

What to do if the code is not working or the menu is hidden

On some Redmi and Poco models, as well as newer versions of HyperOS, access to the engineering menu through code can be blocked by the manufacturer or carrier, in which case, when you type ##4636##, nothing happens. There are several workarounds to solve this problem.

The first way is to use third-party apps from Google Play, such as Force LTE Only (4G/5G) or NetMonster, which use system APIs to open the same menu that is not available through dialing, and then click the Open Old Style LTE button or similar button to call the desired interface.

The second option is for MediaTek processors, which may require the MTK Engineering Mode application, and then go to MTK Settings → Network Selecting → Network Mode and select LTE Only, but this method does not work on all chipsets and requires caution.

If none of the software methods helps, there is an option using debugging on the USB and ADB-commands, but it requires a computer connection and drivers. For most users, installing a specialized assistant application is enough.

Risks and consequences of working in LTE Only mode

The transition to LTE Only has its own technical features that every user should know about. The main problem is that in this mode the phone stops registering on 2G and 3G networks. This means that if there is no 4G coverage in your area, the phone will simply write “No network” and will not be able to receive calls or SMS.

This is particularly critical for voice communication, because if your carrier or phone doesn't support VoLTE (Voice over LTE), the incoming call simply won't pass while you're in a zone without 3G/2G. The subscriber will hear "Subscriber is unavailable." So using LTE Only only makes sense where there's a strong 4G signal and LTE voice is configured.

Also, consider the increased power consumption in low signal areas, and if the phone is at the edge of 4G coverage, it will constantly try to hold the connection to the base station, operating at maximum transmitter power, which can lead to heating of the case and rapid battery discharge.

To return to normal settings, just go back to the menu (through a code or application) and select LTE/TD-SCDMA/GSM or LTE/WCDMA/GSM.

Alternative solutions and communication optimization

If compulsory inclusion 4G If you don't get the desired result or you find it uncomfortable because of the problems with the calls, you should consider other optimization options. SIM-card-plan.

Try to extract SIM-You can wipe the map and wipe the contacts with a soft cloth, and oxidizing the contacts can cause the communication module to work in an unstable way, and check if the card itself is damaged, and in some cases, resetting the network helps: go to Settings. → Connection and sharing → Resetting Wi-Fi, Mobile Internet and Bluetooth.

⚠️ Warning: Resetting network settings will remove saved passwords from Wi-Fi and a pair of Bluetooth devices.Make sure you remember the data to connect to your home router.

Another solution is to manually change the base station. SIM-You can turn off the automatic network selection, wait for the list of available carriers, choose your provider manually, sometimes it helps to "stay" on a better tower.

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LTE Only is a temporary solution to improve internet speed, but not a permanent setup for everyday use unless you’re sure of 100% 4G coverage and VoLTE availability.

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