Modern smartphones on Android automatically connect to the fastest networks - 4G (LTE) or 5Gif they are available. However, there are situations when you need to force a switch to 3G: a weak signal of the new generation, problems with calls, saving battery power or specific tasks (for example, working with old equipment). In this article we will analyze all the current methods - from standard settings to hidden commands for experienced users.
Many people mistakenly think that to switch to 3G it is enough to disable 4G in the settings. In practice, this does not always work: operators can force the device to “tie” to LTE, and in some regions third generation networks are completely disabled. We tested the methods on smartphones Samsung Galaxy, Xiaomi Redmi, Google Pixel and other brands - and identified those that work reliably.
If you encounter a problem lack of network after switching or do not see the option 3G in the menu, do not rush to panic. In 90% of cases, this is solved by resetting the mobile network settings or updating the firmware. But first things first.
1. Standard method: through Android settings
The simplest method is to use the built-in network settings. It is suitable for most devices on Android 8.0 and newer, but the interface may differ slightly depending on the shell (MIUI, One UI, ColorOS etc.).
Open the application Settings and go to the section Network and Internet (or Mobile network/SIM cards and mobile networks). Next, select your SIM card and find the item Network type, Preferred type networks or Network mode. There should be options here:
- 📶 4G/3G/2G (auto) — standard mode (recommended by operators)
- 📱 3G — forced connection to third generation networks
- 📞 Only 2G — if you need to save battery as much as possible
Select 3G and restart the phone. If the option is missing, it means that your operator does not support manual switching (for example, Tele2 blocks this item in some regions). In this case, proceed to the following methods.
On some smartphones Xiaomi i Realme item Network type is hidden. To see it, first tap on the name of the SIM card in the settings, and then scroll down the screen.
2. Using the engineering menu (for advanced)
If the standard settings do not allow you to switch to 3G, you can use engineering menu (Engineer Mode). This method works on most devices, but requires caution: incorrect changes can disrupt the network.
Enter the code in the phone application:
##4636##The testing menu will open. Go to the Phone information (or Phone Information) tab and find the line Set preferred network type. Options are available here:
- 🔄
LTE/WCDMA/GSM auto—automatic selection (4G/3G/2G) - 📱
WCDMA only—3G only - 📞
GSM only—2G only
Select WCDMA only, press OK and reboot the device. If after this the network disappears, return the setting to LTE/WCDMA/GSM auto and try another method.
What to do if the engineering menu does not open?
On some smartphones (for example, Huawei or Honor with firmware EMUI 12+) code ##4636## may be blocked. In this case, try an alternative code:
##2846579##or install the application MTK Engineering Mode (only for processors Mediatek).
3. USSD commands for forced switching
Some operators provide USSD commands to control the network type. the fastest way, but it does not work for all providers. Try entering in the phone application:
| Operator | Command for 3G | Command to return to 4G |
|---|---|---|
| MTS | *111*3661# |
*111*3660# |
| Beeline | *110*180# |
*110*181# |
| MegaFon | *105*484# |
*105*485# |
| Tele2 | No commands (use other methods) | |
After entering the command, wait for an SMS response from the operator. If you receive an error message, it means that the service is not supported in your region.
USSD commands are the fastest way, but they only work if the operator does not block manual network switching. In 2026, many providers are moving away from 3G support in favor of 4G/5G, so this method may not be available.
4. Applications for network management
If the built-in settings and engineering menu do not help, you can use third-party applications. They allow you to force the network type to be set, even if the operator blocks manual switching. The most reliable options:
- 🔧 Network Signal Guru —shows detailed information about the network and allows you to manually select a standard (rights are required root for full functionality).
- 📡 4G Switcher —a simple tool for switching between 2G/3G/4G without root access (does not work on all devices).
- 🛠️ MTK Engineering Mode — for smartphones with processors Mediatek (for example, Redmi, Realme, Tecno).
Before installation, check reviews - some applications may contain advertising or request unnecessary permissions. After installation, open the app, select your SIM card and set the mode WCDMA (3G).
Make sure that the application is downloaded from Google Play (not from third-party sites)
Check permissions - there should be no access to SMS or calls for no reason
Make a backup of your network settings (in Android settings: System → Backup)
Reboot the phone after the changes-->
5. Resetting the network settings and updating the firmware
If none of the methods worked, the problem may be a network configuration failure. In this case, open reset mobile network settings. Open Settings → System → Reset → Reset network settings. After rebooting, the phone will automatically connect to available networks, and you can try switching again to 3G.
If the reset did not help, check firmware updates. Manufacturers regularly release patches to fix problems with the modem. Go to Settings → System → System update and install the latest software version.
On smartphones Samsung after a reset, the network may disappear option Network type. To return it, enter the code *#2263# in the phone application and select Band Selection → Auto.
6. Problems and solutions: what to do if 3G does not work
Even after successful switching to 3G problems may arise. Here are the most common of them and solutions:
- 🚫 No network after switching - check whether your operator supports 3G in your region (for example, Tele2 disables 3G in some cities). Try manually selecting the operator in the settings (
Settings → Mobile network → Network operators). - 🔄 The phone itself returns to 4G — this means that the operator is forcibly switching you to LTE. Solution: use applications like Network Signal Guru with root-rights.
- 📵 Calls or SMS are lost —some operators (for example, Yota) forcefully route voice traffic through 4G (VoLTE). In this case, return to the mode
4G/3G/2G.
In 2026, many operators began mass shutdown of 3G networks in favor of 4G and 5G. If none of the methods worked, contact the support of your provider and find out if the third generation network is still available in yours. region.
How to check whether the operator supports 3G in your region?
Send an SMS with the text 3G to a short number 111 (MTS), 5115 (Beeline) or 0500 (MegaFon). In response, you will receive information about available networks. For Tele2 call on 611 and check with the operator.
FAQ: Frequently asked questions about switching to 3G
❓ Why did the Internet become slower after switching to 3G?
3G speed (HSPA+) theoretically reaches 42 Mbit/s, but in practice rarely exceeds 5–10 Mbit/s. This is 3-5 times slower than 4G. If your goal is to save traffic or connect stability (for example, for voice), then 3G is suitable. For downloading files or streaming, it is better to switch back to 4G.
❓ Is it possible to switch to 3G without access to the settings (for example, on a work phone with restrictions)?
Yes, if you have access to the phone application. Try your operator's USSD commands (see table above) or install the app 4G Switcher -it does not require rootrights. If this is not possible, contact the device administrator.
❓ Is constant use of 3G harmful to the phone?
No, this does not affect the “health” of the smartphone in any way. However, note that 3G mode may drain your battery faster than 4G mode due to a less efficient modem. Also, some applications (for example YouTube or TikTok) can automatically reduce the quality of content.
❓ Why is there no “3G Only” option in the settings?
This may be due to:
- Operator policy (for example, Tele2 hides this option in some regions).
- Outdated firmware (update Android).
- Hardware limitations (some budget smartphones do not have 3G support).
Solution: use the engineering menu or third-party applications.
❓ How to return back to 4G after experimenting with 3G?
Return the mode in the settings 4G/3G/2G (auto) or enter the USSD command to return (see table). If the network is not restored, restart the phone or reset the network settings (Settings → System → Reset → Reset network settings).
If you switch to 3G to save battery power, please note that mode 2G energy consumption will be even lower. However, the Internet speed will drop to 0.1–0.3 Mbit/s (suitable only for instant messengers).