How to enable 3G on Xiaomi: The Complete Guide

Many users of modern smartphones face a situation where in areas of uncertain signal reception, the device automatically switches to 2G or completely loses communication, ignoring the more stable 3G. Owners of Xiaomi, Redmi and Poco devices often wonder how to force the gadget to work in this mode to improve the quality of voice calls or save battery power. Standard settings of the MIUI or HyperOS interface do not always provide direct access to hard fixation, such as a network, requiring a deeper immersion in the system.

The problem may be both the software limitations of the operator and the modem specifics of the particular apparatus. 3G It is often the only exit in rural areas or in buildings with thick walls where the signal is sent to the ground. 4G/LTE It's too weak for stable operation, but it's enough for third generation communication.

In this guide, we'll take you through all the available methods, from simple menu switches to engineering codes, and you'll learn what risks you face when you change system settings and how to safely return all settings to their original state. SIM-map and tariff plan of third-generation services, without which software manipulations will not give a result.

Checking physical factors and SIM-map

Before we get to the complex software settings, we need to rule out the trivial physical reasons for the lack of a stable signal. Often the problem lies in the carrier itself or its installation is not correct. SIM-The card is not corrupted or too old, as old cards may not work properly with modern encryption standards.

Try to remove the tray and carefully examine the contacts of the card. The presence of oxidation or scratches can interrupt the connection at the time of switching between frequencies. It also makes sense to move the SIM to another slot if your Xiaomi smartphone supports two cards to check whether a particular communication module is faulty.

It is important to consider that some carriers are gradually decommissioning 3G towers, redirecting resources to 4G and 5G. In such cases, forced 3G on-line can lead to a complete network absence if this standard is no longer supported by base stations in your location.

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Try to install it. SIM-card of another operator, if 3G If it works, the problem lies in the coverage of your main provider, not in the settings of the phone.

Basic network type setting in the smartphone menu

The safest and first step for any user is to check the standard network settings. The MIUI and HyperOS interface hide some options, but the basic choice of the preferred network type is always available, and you need to go to the settings section associated with mobile networks.

Navigation is usually as follows: open Settings, then select SIM-Maps and mobile networks. In the list that opens, look for Preferred Network Type. Here you will be presented with several options, among which you will need to choose a combination containing the following: 3G, Like, "Prefer to." 3G" or"3G/2G".

If the 3G option is not on the list or is inactive (shadowed), it may mean that the system automatically determines that it is not possible to work in this mode or that the power saving mode is turned on, which blocks switching.

Using the Engineering Menu to Fix 3G

When standard methods fail, the engineering menu, a hidden part of the system designed to test hardware, comes to the rescue, and is accessed on Xiaomi smartphones through a special set of commands in the Phone app, a powerful tool that requires caution.

To enter, dial ##4636##. If the menu opens, select Phone Information. In the list that opens, find the drop-down menu Set Preferred Network Type. Here is a long list of modem technical modes.

You have to choose a mode that compulsorily includes 3G. Look for options with the words WCDMA only or WCDMA preferred. WCDMA is the technical name for the 3G standard used by most carriers. Once you select this option, the phone can briefly lose network and then connect exclusively to third-generation towers.

⚠️ Attention: Selection of regime"WCDMA "only" completely disables the possibility of calls and the Internet through 4G/LTE. If there is no coverage in your area 3G, junction is gone.

Some firmware can block access to the engineering menu through a standard dial, in which case using third-party apps from the Play Market, such as Force LTE Only, which creates a shortcut for hidden setting activity, but using verified codes is always safer.

Settings through the Xiaomi Eu app and hidden features

For advanced users using custom firmware or global versions with the Xiaomi.eu framework installed, there are additional network management options available, and these builds often unlock hidden menus that are not available in the stock version of MIUI.

In some cases, activation 3G It requires you to change the settings in the "Developers" section. To get there, you need to click on the build number several times in the "About Phone" section. In the developer menu, look for options related to mobile networks or standby. mode_, straight-fix 3G There is usually no, it can help reset the hanging network settings.

Also worth mentioning is the existence of hidden calculator apps or test modes that are activated by codes like ##6484## (CIT), which is primarily a hardware diagnostics menu, but some models have radio module testing that indirectly influences connection priorities.

Root-right users can use Magisk dedicated modules that allow you to edit network configuration system files (build.prop or /system/etc files) prioritizing 3G at the core level, the most radical method.

Comparison of network modes and their effect on the battery

Understanding the difference between network modes helps to choose the optimal balance between speed and autonomy. 3G (WCDMA/UMTS) consumes less power than 4G/LTE, especially in conditions of weak signal, when the phone is constantly trying to hold a connection to a distant tower.

Below is a table comparing the main characteristics of the different network modes available on Xiaomi devices:

As you can see from the table, switching to 3G can significantly extend the life of a smartphone in standby mode if you don’t need high page load speeds. However, for today’s heavy-duty applications and video streaming, 3G bandwidth may not be enough.

It is important to note that constant network search (when the phone is tossed between the two) 3G and 4G Because of a bad signal, it consumes more charge than a stable operation in one mode. 3G unstable 4G — This is a smart step to save energy.

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Fixing on 3G in areas of poor 4G reception often saves more battery life than constantly searching for a stable LTE signal.

Possible problems and ways to solve them

Even after you set it up properly, you may encounter difficulties. One of the common problems is that the phone doesn't see the network after selecting "WCDMA only" mode, which means that the current geolocation simply doesn't have 3G coverage. In this case, you need to return the settings to "Auto" or "LTE/3G/2G auto".

Another problem is the inability to make outgoing calls. Some operators use VoLTE technology for 4G calls, and switching to 3G can be difficult if access point (APN) settings are not configured or the operator does not have a voice call service in 3G enabled.

If settings are reset after rebooting, it is possible that your device receives a settings profile from the operator automatically (OTA), in which case it may be necessary to manually configure the APN access point with the WCDMA protocol in the appropriate fields, although modern smartphones usually do this themselves.

⚠️ Note: If after experimenting with the engineering menu, the phone stopped seeing the network at all, perform a full reset of network settings (not data!) through the recovery menu or standard Android tools.

Frequently Asked Questions (FAQ)