Modern mobile data requires high speed, but unstable coverage often forces the smartphone to automatically switch to outdated 2G or 3G standards. This leads to slow page loading speeds and dropped connections at the most inopportune moments. Many users do not even suspect that their device is capable of operating exclusively on a fourth-generation network, ignoring slower protocols.
Forced mode locking LTE Only can be a lifesaver in areas with weak signals, where the phone is constantly “jumping” between different types of towers. However, before you change the default network settings, you need to understand the risks of such an operation. Disabling 3G support may result in you being left without voice communication in an area where there is no 4G if your operator does not use VoLTE technology.
In this article we will analyze in detail all the legal and technical ways to switch your smartphone to 4G-only mode. We will look at both the standard settings menus available on most devices, and hidden engineering codes that open up advanced control options for the radio module. Be careful when following the instructions, as incorrect actions may temporarily disrupt the operation of the communication module.
Standard network settings in the Android interface
The safest and most obvious way to try to improve call quality is to check the standard settings menu. Smartphone manufacturers often hide the choice of preferred network type deep enough to prevent inexperienced users from accidentally disrupting the device. First, you need to open the section Settings and find the item related to the connection.
Depending on the version of the shell MIUI, One UI or stock Android, the path may differ slightly. Usually the required menu is located at Connections → Mobile networks → Network mode. Here the system will offer you several options, among which the most common is the combined mode 2G/3G/4G (auto).
Unfortunately, on many modern smartphones, manufacturers have deliberately hidden the ability to select exclusively LTE standard interface. This is done to ensure that voice calls over 3G networks will work in the event of a VoLTE failure. If the list of available modes does not include LTE Only, you will have to use the alternative methods described below.
⚠️ Warning: If you select 4G only mode and there is no LTE network in your coverage area, you may lose the ability to make and receive regular calls. Make sure that your tariff supports VoLTE technology.
Before changing network settings, write down the current settings or take a screenshot of the screen so that in case of problems you can quickly return everything to the way it was.
Using the engineering menu through hidden codes
The engineering menu is a hidden section of the firmware intended for testing equipment by developers and service technicians centers. It is here that the communication mode switches are inaccessible to the average user. This menu is accessed through a set of special USSD codes in the Phone application.
The set of codes varies depending on the processor installed in your smartphone. For devices based on MediaTek the most common code is ##3646633##. For processors Spreadtrum (Unisoc), the combination ##8375##often works. Device owners Samsung can try *#0011# to enter the service mode, although the interface there may differ.
After entering the code, a specific interface with many tabs will open. You need to find the section Telephony or Network Selecting. In this menu, the item searched for is Set Preferred Network Type. By clicking on it, you will see a long list of different communication standards, from GSM to NR (5G). You need to select the option whose name contains LTE Only.
What to do if the code does not work?
Some telecom operators or manufacturers block access to the engineering menu through a standard compositor. In this case, try installing a third-party application, for example, MTK Engineering Mode, which may request special permissions to access modem functions.
Changing the parameter occurs instantly. Once you select the desired mode, the network icon at the top of the screen should change to show only 4G or LTEeven if the signal strength is weak. The phone will stop trying to switch to 3G, which can stabilize the Internet connection, but will make voice communication dependent solely on the quality of packet data transmission.
Using third-party applications for network management
If the built-in codes do not work or the engineering menu interface seems too complicated, specialized applications from the store come to the rescue Google Play. These utilities act as a convenient shell that provides access to the same functions of the radio module, but in a more understandable form. One of the most popular solutions is the application Force LTE Only (4G/5G).
After installing such an application, you do not need to remember complex combinations of numbers. The app automatically determines the method of accessing network settings for your phone model. The method via Activity, which opens a hidden system settings window created by Android developers, but not displayed in the main interface.
Inside the application you will see two main tabs: one for older versions of Android (Method 1), the other for new ones (Method 2). You need to select the appropriate method and set the value Set Preferred Network Type set value LTE Onlyin the drop-down list. After applying the settings, the phone will be forced to lock onto fourth-generation towers.
- 📱 Force LTE Only - a simple application with a minimalistic interface that works on most devices.
- 📡 NetMonster - a powerful tool for monitoring towers, which also allows you to change the network type in advanced settings.
- ⚙️ MTK Engineering Mode - a specialized utility for MediaTek chips, if the standard code is not works.
It is worth noting that the operation of such applications may require special permissions through a computer with USB debugging, especially on newer versions of Android with enhanced security protection. If the application says that access is denied, you may need to activate developer mode.
⚠️ Attention: Application interfaces and system menus may change with Android updates. What worked on version 11 may be blocked on version 13 or 14 without root access.
Settings through developer mode and ADB
For advanced users who are not suitable for standard methods, it is possible to manage network settings through the debug bridge ADB (Android Debug Bridge). This method requires connecting your smartphone to your computer and installing the appropriate drivers and platform tools. It gives the deepest access to the system without the need to obtain root access.
First you need to activate developer mode. To do this, go to Settings → About phone and quickly click on the item Build numberseven times. After this, a new section will appear in the settings menu For developers. In it you need to activate the switch USB debugging.
Having connected the phone to the PC, open the command line and enter the command to enter the device shell:
adb shellNext, to change the preferred network type, use the command service call. However, the syntax of this command is highly dependent on the Android version and the specific radio interface implementation (RIL). A more universal way through ADB is to launch the hidden settings activity:
adb shell am start -n com.android.phone/.MobileNetworkSettingsThis command can open a hidden network selection menu that is not accessible through the regular interface. If the command does not work, you can try directly calling the engineering menu via ADB using the appropriate intent commands for your processor model. This method requires caution, as incorrect input may cause the radio interface service to fail.
☑️ Preparing to work with ADB
Using the command line gives flexibility, but requires technical literacy. Unlike graphical apps, there are no back buttons, so it's important to be clear about what command you're entering. An error in the syntax simply will not perform the action, but an attempt to write non-existent parameters to the modem registry may cause it to reboot.
Features of working with different processors and brands
The procedure for enabling the mode LTE Only directly depends on the hardware platform of your smartphone. Different chipset manufacturers implement radio control differently, which affects the available codes and configuration methods. Understanding these differences will help you choose the right path to solve the problem.
Devices based on Qualcomm Snapdragon often have a more closed architecture of network settings in the standard engineering menu. For them, using third-party applications or ADB commands is most often effective. At the same time, chips from MediaTek traditionally provide more open access to network parameters through code ##3646633##.
Brand smartphones Samsung use their own One UI shell, which can block standard engineering codes. For these, using a code *#0011# to view information is often recommended, but changing settings may require a special application Samsung Band Selectionavailable from the Galaxy Store or third-party repositories.
| Chip Manufacturer | Typical passcode | Menu features | Recommended method |
|---|---|---|---|
| MediaTek | ##3646633## |
Detailed engineering menu | Engineering menu |
| Qualcomm | Depends on the brand | Often hidden | Applications / ADB |
| Spreadtrum | ##8375## |
Basic settings | Engineering menu |
| HiSilicon | Specific for Huawei | Limited in new models | Secret brand codes |
The success of the operation depends not only on the phone model, but also on the firmware version released by the manufacturer. A software update can close previously available loopholes.
Returning to standard mode and solving problems
After testing the mode LTE Only you may encounter a situation where the connection disappears completely or the quality of calls becomes unsatisfactory. In this case, it is critical to know how to reset the settings to their original state. The easiest way is to simply restart your device. In most cases, when you turn on the phone, it resets the temporary network preferences and returns to the 2G/3G/4G (auto) mode.
If the reboot does not help, you need to go back to the menu where you changed the settings (engineering menu or application), and select the item GSM/WCDMA/LTE Auto or a similar option with a prefix Auto. This will restore the phone's ability to switch between all available communication standards depending on the signal quality.
In rare cases when the settings get stuck and the phone does not see the network at all, you may need to reset the network settings. This action won't delete your personal files, photos or apps, but it will forget saved Wi-Fi passwords and paired Bluetooth devices. The path to reset is usually located in the section Settings → System → Reset settings → Reset Wi-Fi, mobile data and Bluetooth settings.
⚠️ Attention: If after all the manipulations the phone no longer sees the SIM card or network, the modem profile may have been software damaged. In this case, the only solution is to reflash the device or contact a service center.
Remember that forced 4G mode is a temporary solution to improve Internet speed in specific conditions. For everyday use, especially when traveling outside the city, where coverage is patchy, it is better to leave automatic network selection. This will ensure a balance between data transfer speed and voice stability.
Frequently asked questions (FAQ)
Is it safe to keep the phone in LTE Only mode all the time?
This is safe for the device itself and will not lead to physical damage. However, this may be inconvenient for the user: in areas without 4G coverage, you will be left without communication, since the phone will not switch to 3G to make a call if VoLTE is not configured.
Why do incoming calls not work after turning on 4G mode?
Most likely, your operator does not support VoLTE (Voice over LTE) technology in your region, or it does not activated on the tariff. In LTE Only mode, voice calls are only possible via the Internet protocol. If there is no VoLTE, calls will not go through.
Will the LTE Only mode disappear after rebooting the phone?
In most cases, when using engineering codes or applications without root access, the setting is reset to standard (Auto) after reboot. To save the mode, some applications require special permissions or superuser rights.
Does this mode affect battery consumption?
Yes, it can. If the 4G signal is weak, the phone will constantly boost its transmitter power to maintain a connection only to this standard, without being able to switch to more energy-efficient 2G/3G when idle. This can speed up the discharge.
Is it possible to turn on 5G only using a similar method?
Yes, the NR Only or LTE/NR Onlymodes are often available in the engineering menu or applications. The principle of operation is identical: you need to find the corresponding item in the list of preferred network types and activate it.