In the modern world, high-speed mobile data has become the standard, and most smartphone owners do not even think about which data transfer protocol is currently used. However, situations are different: sometimes mobile network it works unstable, or you need to maximize the battery life of the device away from charging. In such cases, it becomes necessary to forcibly switch the modem operating mode to older but stable standards, such as 3G or even 2G.
Disabling the fourth generation of communications (LTE) can solve a number of specific problems faced by users of Androidsmartphones in remote regions or buildings with thick walls. It often happens that the phone is constantly trying to maintain a weak 4G signal, which is why the battery discharges catastrophically quickly, and the quality of voice communication remains unsatisfactory. A forced change of the communication standard allows you to fix the device on a tower with a more powerful signal, providing a stable call and saving energy.
In this article we will analyze in detail all the available ways to change the network type, from standard settings in the menu to using the engineering menu and special applications. You will learn what hidden risks exist when manipulating the radio module and how to correctly return all the settings back when the need for this is no longer necessary.
Why disable high-speed Internet at all
The main reason why users are looking for a way how to disable 4Glies in the coverage features of cellular operators. In areas of poor reception, the smartphone begins to work in constant network search mode or frequently switching between standards (3G/4G). This process requires significant energy consumption, since the radio module operates at increased power. If you are in the forest, in a basement or in a rural area where 4G towers are rare, it is better to forcefully limit the phone to standard UMTS or GSM.
Another important factor is overheating of the device. When actively working on fourth-generation networks, the smartphone's processor and modem can heat up significantly, especially if you use navigation or heavy applications while transferring data. Switching to 3G reduces heat generation, which has a positive effect on overall system performance and battery life.
⚠️ Attention: Before changing your network settings, make sure your data plan supports voice calls on 3G/2G networks. Some modern tariffs are optimized exclusively for VoLTE (voice over 4G), and if LTE is turned off, you may be unable to make calls.
It is also worth mentioning scenarios for using old devices or specific equipment. Some IoT gadgets or old phones used as spares may not work correctly in mixed network mode. Fixing to one standard simplifies their work and prevents accidental disconnections.
Standard method through Android settings
The safest and easiest method of changing the network type is available through the standard settings menu of your smartphone. Interface may vary slightly depending on version Android and the manufacturer's shell (for example, MIUI, OneUI or ColorOS), but the logic of action remains the same. You do not need superuser rights or installing third-party software.
First, open the main menu and find the section responsible for connections. It is usually called "Connections", "Network and Internet" or "Mobile Network". Inside this section you need to find the item “Network type” or “Preferred network type”. This is where the switch that controls the operation of your modem is hidden.
By clicking on this item, you will see a list of available options. By default, the “5G/4G/3G/2G (auto)” or similar mode is usually selected there, implying automatic selection of the best standard. Your task is to choose the option that excludes LTE. This may be the item “3G only”, “3G/2G” or “WCDMA/GSM”. After selection, the system will apply the settings within a few seconds, and the 4G icon in the status bar will disappear.
☑️ Checking network settings
If you cannot find the item you need in the main menu, try using the search in settings. Enter the word “network” or “preferred” into the search bar, and the system itself will suggest the desired section. This is especially true for smartphones with a complex menu structure, where the desired option can be hidden deep in sub-items.
Using the engineering menu for fine-tuning
For advanced users for whom the standard menu does not provide the necessary options (for example, there is no “3G Only” choice), there is access to the engineering menu. This is a hidden section of the system, intended for testing equipment by engineers, but also accessible to ordinary users through special USSD codes or applications.
The most common login method is using a combination of numbers in the “Phone” application. For processors MediaTek code often works ##3646633##, and for processors Qualcomm — ##4636##. After entering the code, you will be taken to a hidden menu where you need to find the “Phone Information” or “Phone Information” section.
##4636##In the window that opens, find the “Set Preferred Network Type” drop-down list. There is a much wider selection of radio module operating modes here. You need to select an option whose name does not contain the words LTE or NR (for 5G). The optimal choice would be “WCDMA Only” (3G only) or “GSM Only” (2G only) if you need maximum energy savings.
⚠️ Attention: Be extremely careful in the engineering menu. Changing parameters other than the network type (for example, calibrating sensors or adjusting frequencies) may lead to incorrect operation of the smartphone or complete loss of communication.
It is worth considering that on some new smartphone models, access to the engineering menu through codes may be blocked by the manufacturer or telecom operator. In this case, the system will simply show an error message or nothing will happen after entering the combination.
What to do if the codes do not work?
If standard USSD codes do not open the engineering menu, try installing the Activity Launcher application from Google Play. With its help, you can find and launch the hidden system activity “Testing”, which opens the same network settings menu as the code ##4636##.
Use of third-party applications for network management
If the built-in system tools and engineering codes are for some reason inaccessible or inconvenient, specialized applications from the store come to the rescue. Google Play. These utilities create shortcuts for quick access to the network selection menu or offer a more convenient interface for managing modem parameters.
One of the most popular solutions is the application Force LTE Only (4G/5G) or its analogues, such as Network Mode Guru. The principle of their operation is that they open the same hidden radio module settings menu that was discussed in the previous section, but they do it in one click, without the need to remember complex codes.
- 📱 Force LTE Only — allows you to quickly switch between modes, including forced 4G or, conversely, disabling LTE.
- 📶 Network Mode Guru —offers detailed statistics on the signal and convenient selection of the preferred network type.
- 🔋 Battery Doctor —some energy saving functions in such applications automatically turn off 4G when the battery is low.
When using such applications, it is important to remember permissions. To work correctly, they will need access to the phone and network status. Download software only from trusted, highly rated developers to avoid installing malware that can intercept your data.
Before installing network management applications, check user reviews for the last month. Developers often update software for new versions of Android, and old versions may simply not work on the latest firmware.
The impact of turning off 4G on the speed and quality of communication
Forced transition to third-generation networks inevitably entails a reduction in the maximum data transfer speed. If in networks LTE you could count on speeds of tens and hundreds of megabits per second, then in 3G (HSPA+) real speeds are usually from 2 to 10 Mbit/s, and in conditions of poor signal - even less.
This is critical for streaming high-definition videos, downloading large files or using heavy online games. However, for basic tasks such as instant messaging, email, navigation and listening to music, 3G bandwidth is sufficient. Moreover, in conditions where 4G towers are overloaded, stable 3G can provide even better responsiveness when loading web pages.
| Features | 4G (LTE) | 3G (UMTS/HSPA) | 2G (GSM/EDGE) |
|---|---|---|---|
| Max. speed (theoretically) | up to 300 Mbit/s | up to 42 Mbit/s | up to 0.47 Mbit/s |
| Energy consumption | High | Medium | Low |
| Indoor stability | Medium/Low | High | Very High |
| Voice quality | HD (VoLTE) | Standard | Low |
It is important to note that voice quality may also change. 4G networks often use VoLTE technology to provide high-definition audio. When you switch to 3G, you will revert to standard voice quality, and in some cases, if the operator does not support CSFB (return to circuit switching), the call may not go through at all if the standards are not configured correctly.
Disabling 4G is a trade-off between internet speed and connection stability/battery life. Use this mode situationally when speed is not a priority.
Returning to default settings and troubleshooting problems
After you have solved the problem with a low battery or unstable connection, most likely you will want to return high-speed Internet back. The return procedure is as simple as possible: you need to go to the network type settings again and select the “Auto” or “5G/4G/3G/2G” mode. The smartphone will independently scan the airwaves and connect to the fastest available network.
Sometimes after experimenting with the settings, the phone may freeze in network search mode or stop seeing the SIM card altogether. In such a situation, the first thing to do is try rebooting the device. If this doesn't help, check to see if Airplane Mode is accidentally activated. It is also worth removing and reinserting the SIM card, making sure that the contacts are clean.
In rare cases, especially after using the engineering menu, the settings may be incorrect. If the standard mode selection does not help restore 4G, you can reset the network settings. Please note that this operation will delete saved Wi-Fi passwords and Bluetooth pairing settings, but will return the modem settings to factory settings.
⚠️ Attention: Interfaces of telecom operators and phone manufacturers are constantly updated. Menu location and available modes may vary on your specific model. If you do not find the described items, check the official documentation for your device.
Frequently asked questions (FAQ)
Will the Internet work if I turn off 4G?
Yes, the Internet will work, but its speed will be limited by the capabilities of the 3G or 2G network. This is usually enough for viewing websites and instant messengers, but high-quality video can be slow.
Why do calls disappear after turning off 4G?
This can happen if your operator uses VoLTE technology for voice calls and does not support return to 3G/2G for voice (CSFB). In this case, you need to turn 4G back on or change the operator.
Is it harmful to keep the phone in 2G/3G mode all the time?
No, it is not harmful to the device. On the contrary, it reduces the load on the battery and reduces heating. The only negative is the low Internet speed.
Is it possible to disable 4G for only one SIM card in a dual-SIM phone?
Yes, in the mobile network settings you can usually select the network type separately for each SIM card. Go to the settings of a specific SIM card and change the preferred network type for it.
Why does the phone turn on 4G again after a reboot?
Some firmware reset non-standard network settings when rebooting to ensure stability. In this case, you may need to use a third-party application that fixes the setting, or repeat manual mode change after each turn on.