How to enable 4G on Xiaomi Redmi: troubleshooting and setting up

Modern smartphones Xiaomi Redmi offer users a wide range of functionality for multimedia and work, but the basic requirement remains a stable high-speed connection. Often device owners are faced with a situation where the device automatically switches to an outdated standard. 3G or 2G, And that makes it impossible to use navigation, streaming services and video calls comfortably. 4G LTE It may require not just activation of a single button, but a comprehensive check of network settings, physical integrity. SIM-maps and correctness of operator parameters.

In most cases, the problem lies in software constraints or incorrectly selected priorities in the settings menu. MIUI. The user must make sure that the right slot is chosen for the SIM-cards, as in two-symbol models, only one slot can support high-speed Internet while the second is occupied by voice communication. It is also worth considering that the coverage area of the carrier can be unstable in a particular location, which causes the phone to look for a more reliable, albeit slow, signal.

If the automatic setup doesn’t work, manual system settings will be required.This involves checking the supported CPU frequencies of your smartphone and matching them to the ranges your ISP uses. It’s critical to know that some global versions of Redmi may not support certain LTE frequencies (e.g., Band 20) popular in Europe and Russia, which may cause 4G to fail physically.

Verification of standard support and physical SIM-map

The first step in diagnostics is to eliminate hardware limitations and physical defects. Not all Xiaomi models work equally well with all carriers. You need to make sure that your device is technically capable of receiving fourth-generation signals in your region. You can use the technical specifications on the official website or check the information in the engineering menu, but to start with a basic check is enough.

Pay attention to the integrity of yourself. SIM-If a card has been in use for several years, its contacts may have oxidized and its metal surface damaged by nano-SIM cutting, in which case the phone may detect the presence of a SIM, but it will not be able to register with the network. LTE. It is recommended to remove the tray, wipe the contacts with a stripe or soft cloth and install the map again, making sure that the fit fit is tight.

• 📱 Make sure that SIM-card 4G (They often have a logo on them. 4G/LTE).
• 🔍 Check if the card is inserted into the correct slot (usually Slot 1 is marked as the primary for data).
• 📶 Check with the operator whether the service is activated 4G on your tariff plan.
• 🛠️ Try to rearrange. SIM-card in another smartphone to exclude the breakdown of the SIM itself.

⚠️ Note: If you are using a homemade SIM-A card cut out of a mini or micro format, make sure chips and contacts are not affected.A rough edge can damage the contacts inside the smartphone tray.

It’s also worth checking if the phone is locked by the carrier, and if the device was purchased overseas under a contract, it can be tailored to a specific provider, so even with frequency support, it’s impossible to enable 4G on Xiaomi Redmi without unlocking, and global versions that are officially purchased are usually free of such restrictions.

Basic network settings in the MIUI menu

Standard shell interface MIUI It provides a flexible enough tool to manage mobile networks, and users often accidentally switch the phone to "Only" mode. 3G" or "2G/3G" To save battery power, forgetting to return the settings back, you need to go to the settings menu to fix this. → SIM-maps and mobile networks.

In the window that opens, select SIM-The map you plan to use to access the Internet. Find the preferred type of network. Here you will be offered several options. LTE or 4G/3G/2G (If the option "Only" is selected 3G", The phone forcibly ignores fourth-generation towers, even if they are in the immediate vicinity.

Once you change the setting, the phone can lose the network for a few seconds and re-register, during which time the signal light can flash or temporarily disappear. This is normal behavior when you reconnect to a base station of another standard. If after selecting LTE, the icon "4G" or "H+" did not appear, try rebooting the device.

• 🔄 Reboot allows you to reset temporary errors of the communication module.
• ✈️ In-flight mode, which is turned on for 10 seconds, also helps to reconnect to the tower.
• 📲 Make sure the mobile internet switch is activated for the selected SIM.

Manually configuring APN access points

One of the most common reasons for the lack of high-speed Internet is an incorrect access point. APN. Xiaomi smartphones usually automatically load these settings when installing a new one. SIM-maps, but sometimes this process is wrong or old parameters are used. APN The phone can show the presence of the network 4G, But the internet won't work.

For manual settings, go along the way: Settings → SIM-maps and mobile networks → (Choose. SIM) → Access points (APN). At the bottom of the screen, click the New Access Point (or plus) button, and you need to enter the data that your carrier provides (APN).

Name: MTS Internet


Access Point (APN): Internet.mts.ru




User name: mts




Password: mts

Once you have entered, be sure to click the menu (three dots in the corner) and select Save. Then go back to the list of access points and activate the one you just created by putting a marker next to it. Without saving, the changes won't take effect, and the Internet won't work.

⚠️ Note: In the fields of login and password for some operators (for example, MegaFon or Tele2) You can have a dash, which means you don't have to enter data.

Using an engineering menu for forced LTE

If standard methods don't work, you can use Android's hidden engineering menu, which allows you to force the modem to switch to LTE-only mode, ignoring other standards, and is especially useful in areas of unstable reception, where the phone constantly "jumps" between 3G and 4G, breaking the connection.

Open the Phone app and dial the combination: ##4636##. If the code is entered correctly, the test menu will open. Select Phone Information. Find the drop-down list to Set your preferred network type.

Select LTE Only. Immediately after that, the connection may disappear completely - this is normal, since the phone stopped looking for 2G/3G networks. If there is no 4G coverage in your area, the calls will not work (as VoLTE may not be configured), but the Internet will appear. To return to normal mode, select LTE/TD-SCDMA/CDMA/EvDo/GSM/WCDMA.

• ⚡ Regime "LTE Only guarantees maximum speed, but can increase battery consumption.
• 📞 In mode "LTE Only incoming calls may not be possible without VoLTE technology.
• 🌐 This method helps to "fix" the phone on the tower 4G borderland.

Resetting network settings and software updates

The accumulation of software errors during operation can cause a failure in the communication module. If previous steps have not worked, it is worth trying to reset the network settings to factory. This action will not delete your personal files, photos or applications, but will return the settings of Wi-Fi, Bluetooth and mobile networks to their original state.

You can reset via the menu: Settings → Connection and Sharing → Reset Wi-Fi, mobile network and Bluetooth. Confirm the action and wait for the process to complete. After that, the phone will restart, and you will need to re-enter passwords from Wi-Fi networks and configure APN access points, as described above.

Also, don’t ignore system updates. Xiaomi regularly releases security patches and firmware updates, which often contain patches for modem errors. Go to Settings → About Phone → MIUI Version and check for updates. The current version of the software may contain important drivers for your region.

💡

Before performing a full Hard Reset, be sure to back up your data, as this action will remove all information from the device. Resetting only network settings is data-safe.

Frequent problems and their solution

Even after setting up correctly, users may experience periodic problems, such as a phone showing 4G but pages don't load, often due to a crowded DNS cache or temporary crashes on the operator's side, in which cases it helps to turn flight mode on and off or simply restart the device.

Another problem is the lack of 4G only in the second SIM slot.This is a technical feature of many smartphones, where the second slot can be limited to the 2G/3G standard while the first one is running in 4G mode. In such cases, to get maximum speed, you need to move the SIM card with the Internet into the first slot.

⚠️ Warning: If the phone heats up and discharges quickly when turned on 4G, It's possible that the device is in a very weak signal zone, in which case the communication module is operating at the power limit. 3G or use Wi-Fi.

If nothing works, it may be the hardware of the antenna or modem, especially if the phone is falling or exposed to moisture, which would require a diagnosis at the service center, but 90% of the time, a competent setup of the APN and the choice of network type solves the problem.

💡

The correct setting of the APN access point and the choice of “Prefer LTE” mode solve the problem of the lack of 4G in most cases on Xiaomi smartphones.

Questions and Answers (FAQ)