In the era of widespread high-speed Internet, users are often faced with a paradoxical situation: the presence of a powerful signal 4G does not always guarantee high-quality communication. There are times when, in order to make a voice call or save battery power, you need to force a switch to standard 3G (or WCDMA). This is especially true in areas of poor reception, where the phone constantly jumps between standards, wasting energy.
The operating system Android provides built-in tools for controlling the type of network, but their location depends on the specific version of the OS and the manufacturer's shell. In some cases, the standard settings menu hides the choice, requiring the use of engineering codes or third-party utilities. Forced switching can be a temporary solution to problems with unstable Internet or "dropping" calls.
Before you start changing settings, it is important to understand the difference between LTE i UMTS. If your goal is to save data or battery, switching to 3G may be worth it. However, if the problem lies in a malfunction of the operator's base station, changing the communication standard may temporarily improve the situation, but will not eliminate the root cause of the problem.
Why do you need to turn off 4G and switch to 3G
The main reason why users are looking for a way how to change 4G to 3G on Androidis the instability of voice communication. In fourth generation networks, voice is transmitted using technology VoLTE. If your smartphone or SIM card does not support this function, and the coverage LTE is weak, the phone tries to transmit voice through packet data, which often leads to interruptions or inability to get through.
Another important aspect is power consumption. A communication module that is constantly trying to maintain a weak signal 4Gconsumes significantly more energy than when operating in 3Gmode. In conditions of a country trip or a low battery charge, artificially limiting the network speed allows you to extend the battery life of the device by several hours.
⚠️ Attention: Forced switching to 3G will lead to a significant decrease in the speed of loading web pages and watching videos. Use this mode only when absolutely necessary or in areas of poor LTE coverage.
Sometimes telecom operators carry out technical work on towers LTE, and at this time the network may not work correctly. A temporary switch to WCDMA allows you to stay in touch until specialists fix problems in the high-speed network segment.
Standard method through the Android settings menu
The safest and easiest method of changing the network type is available through the standard settings menu. The interface may differ slightly on different devices, but the logic of actions remains the same. You will need to find the section responsible for mobile networks and connection parameters.
Go to the settings of your smartphone and find the item related to connection. On pure Android this is usually the “Network and Internet” section, and on shells like MIUI or OneUI - “SIM cards and mobile networks”. Here you will see an option to select the network type.
In the list that opens, select the option 3G/2G (auto) or 3G only. After confirming the choice, the icon 4G or LTE in the status bar will disappear, giving way to the icon 3G or H+. This action does not require rebooting the device and takes effect instantly.
- 📱 Open
Settingson the main screen. - 📡 Go to section
ConnectionsorMobile network. - 🔒 Select item
Network modeorPreferred network type. - ✅ Tap on the option
3G (WCDMA)to fix the standard.
If there is no network selection item in the settings menu, it may be your telecom operator hid this option via configuration profile. In this case, try removing the SIM card and inserting it again before making the settings.
Using the engineering menu to change mode
If the standard menu does not provide the necessary options, you can use the hidden one engineering menu. This tool is intended for technicians, but is also available to ordinary users through special codes. Be extremely careful: changing unverified parameters may disrupt the operation of the radio module.
To enter the engineering menu, open the “Phone” application and dial the code ##4636##. This is a universal combination for most devices based on Android. If the code does not work, try #0011# (for Samsung) or ##3646633##* (for processors MediaTek).
In the menu that opens, select the section Phone information (Phone Information). Scroll down the screen to the item Set preferred network type (Set Preferred Network Type). In the drop-down list, find the value WCDMA Only or GSM/UMTS.
##4636##⚠️ Attention: Do not change IMEI or other settings parameters in the engineering menu that are not related to the type of network. This can lead to blocking of the device by the telecom operator or complete loss of the signal.
After selecting the desired standard, the phone will immediately reconnect to the available cell tower. To return everything back, just select the mode LTE/TD-SCDMA/GSM/WCDMA or a similar one with a mark in the same list. data-i="110">☑️ Check before entering the engineering menu Preferred.
☑️ Check before entering the engineering menu
Third-party applications for network management
When the built-in Android tools fail or the interface is too confusing, specialized utilities from Google Playapplications like Force LTE Only or Netmode Selector provide convenient access to hidden functions of the radio module without the need to remember complex codes.
Such apps often have a simplified interface, where switching between 4G, 3G and 2G is carried out with one click of a button. useful on older versions of Android, where the settings menu may have been cut down by the manufacturer.
However, it is worth considering that some applications require root accessto function fully. Without superuser rights, the functionality can be limited only to viewing information about the signal, without the ability to change the configuration.
- 🛠 Force LTE Only (4G/5G) - a popular solution for forcing a mode change.
- 📶 Network Cell Info Lite - a powerful tool for monitoring and configuration.
- ⚙️ MTK Engineering Mode - a specialized utility for chips MediaTek.
Risks of using third-party software
Some applications may contain advertising or collect network usage statistics. Download utilities only from the official Google Play store and check reviews before installing.
Features of switching on different shells
Smartphone manufacturers often modify the standard interface Androidby adding their own shells. This affects the layout of menu items and the availability of functions. Below is a table with paths to network settings for popular brands.
| Brand / Shell | Path to settings | Features |
|---|---|---|
| Samsung (One UI) | Settings → Connections → Mobile networks |
The “3G Only” mode is often hidden, only auto-selection is available. |
| Xiaomi (MIUI) | Settings → SIM cards and mobile. network → Network type |
Allows you to configure preferences for each SIM card in detail. |
| Huawei (EMUI) | Settings → Wireless networks → Mobile network |
Permission is required to change settings at first login. |
| Pixel (Stock Android) | Settings → Network and Internet → Mobile network |
Minimalistic interface, hidden settings through codes. |
On devices Samsung users often complain about the lack of an explicit “3G Only” choice. In this case, engineers recommend using the combination *#0011# to enter the service menu, where you can manually select BAND or operating mode.
Owners Xiaomi are luckier: their menu often contains an expanded list, including even outdated standards GPRS and EDGE. This gives maximum control over the communication module in any conditions.
The location of the settings depends on the firmware version. If you do not find the item in the specified location, use the search in the settings by entering the request “Network type” or “Preferred type.”
Possible problems and ways to solve them
After switching to 3G you may encounter that the Internet has stopped working altogether. This means that there is no third generation coverage in the area where you are located, or the traffic limit for this standard has been reached on the SIM card. In this case, you need to return the settings to automatic mode.
Another common problem is the inability to make calls after changing the mode. Some operators require the phone to be registered on the network LTE to pass authentication, even if the call goes through 3G. If calls do not go through, try rebooting the device in airplane mode.
⚠️ Attention: Settings interfaces and capabilities of telecom operators may change. If the described methods do not work, check the current settings in your operator’s personal account or contact support.
Sometimes the phone gets stuck in network search mode. In this case, a complete reset of the network settings will help (not to be confused with a complete reset of the phone!). This operation will delete saved access points APN and settings Bluetooth, but will return the communication module to factory settings.
Frequently asked questions (FAQ)
Does switching to 3G affect the quality of voice calls?
Yes, often the voice quality in 3G networks is more stable than in 4G without VoLTE support, since a dedicated voice channel is used rather than data transmission.
Will this save battery power?
In areas of weak 4G signal - definitely yes. The phone will stop constantly increasing the transmitter power to maintain communication with a distant LTE tower.
Is it possible to lose contacts when changing network settings?
No, changing the network mode (4G/3G) does not affect saved contacts, photos or applications in any way. This applies only to the radio module.
Why did the Internet disappear after the switch?
Perhaps there is no 3G coverage in your current location, or the APN access points for this type of network are incorrectly configured. Check the APN settings in the mobile networks menu.
Is it safe to use engineering codes?
Yes, if you only change the “Preferred Network Type” parameter. Changing other values in the engineering menu can lead to incorrect operation of the phone.