What is LTE in the smartphone Xiaomi Redmi 9: the complete guide

A modern smartphone is impossible to imagine without high-speed mobile Internet, and the Xiaomi Redmi 9 model is no exception, offering users support for advanced communication standards. The acronym LTE, which you often see in the status bar of the device, stands for Long Term Evolution and is the standard for wireless data transmission of the fourth generation (4G).

Redmi 9 owners often face the need to manually configure or choose a preferred network type, especially if the device automatically switches to slower 3G or even 2G in areas of uncertain reception. Understanding how this protocol works in the MIUI shell allows you to significantly improve communication quality and reduce battery consumption. In this article, we will discuss in detail the technical features, activation methods and solutions to common problems associated with high-speed connection.

It’s worth noting that understanding the workings of the communication module helps not only to enjoy fast surfing, but also to save traffic, as many applications begin to consume more data when switching to high speeds. In addition, knowing the nuances of working Redmi 9 in fourth-generation networks will come in handy when traveling abroad, where specific APN settings or selecting a specific frequency range for roaming may be required.

Technical features of the communication module in Redmi 9

Xiaomi Redmi 9 is equipped with a processor MediaTek Helio G80, which integrates a modern modem that supports frequency aggregation and operation in LTE Cat. 6. This means that the theoretical speed of downloads can reach 300 Mbps, although in practice these figures depend solely on the capabilities of your carrier and the loading of the tower at a particular time.

One of the key features of the MIUI communication implementation is the ability to fine-tune the preferred network type in detail. The user can force the smartphone to switch to LTE mode only, which is sometimes necessary for stable video calls, or allow automatic switching to 3G/2G to save energy in low signal areas. It is important to understand that constantly searching for a 4G network in poor coverage can lead to accelerated battery discharge, so the flexibility of settings plays a crucial role here.

⚠️ Attention: Forced incorporation of the “Only” regime LTE" in areas where the coating 4G Unstable or absent, can cause complete loss of communication (no network mode) as the phone will no longer see the towers 2G and 3G.

Also worth mentioning is VoLTE (Voice over LTE), which allows voice calls directly through a 4G channel without lowering the connection speed to 3G during a conversation. In Redmi 9, this feature is often turned on by default, but its availability depends on support from your mobile operator. If the indicator in the status bar switches from "4G" to "H+" or "3G" after the call starts, then VoLTE is not active at the moment.

How to enable and configure LTE on Xiaomi Redmi 9

Activation of high-speed mode in Xiaomi Redmi 9 usually occurs automatically when installed SIM-card-holder 4G, But in some cases, you need to have manual intervention. SIM-The card supports the standard LTE You have the appropriate data plan connected to the operator, and then you should go to the device settings menu to check and, if necessary, change the parameters of the preferred network type.

The setup process is as follows: open Settings, then go to the section SIM-Maps and mobile networks. Choose active networks. SIM-map (if there are two) and find the item Preferred network type.In the list that opens, you need to select the option that contains the marking 4G or LTE, Like, "Prefer to." LTE" or"4G/3G/2G (This choice gives the system the command to use the high-speed protocol.

Sometimes it happens that even after choosing the right item on the menu, the icon 4G In this case, additional adjustment of the access point may be required (APN). Go to the Settings path → SIM-maps and mobile networks → Name of the access point (APN) and select your operator's settings or create a new one by entering the data obtained on the provider's official website. APN This is one of the most common reasons why the Internet doesn’t work even when you have a signal.

Network modes: 4G, 3G and 2G

Understanding the difference between network modes is critical to optimizing your Redmi 9. Each communication standard has its advantages and disadvantages, and the choice between them should depend on the current situation. LTE (4G) mode provides maximum data speed, which is ideal for streaming, gaming and downloading large files, but requires more power and good coverage.

Regime. 3G (UMTS/HSPA) is a compromise option that provides decent speed for browsing and instant messengers, but with less power consumption compared to the previous one. 4G. Standard 2G (GSM/EDGE) It is used mainly for voice calls and text messaging in places where modern coverage is not available. MIUI Try to automatically balance between these modes, but the user can always take control of the game.

Here is a quick comparison of the different modes:

If you’re in a zone with a very weak 4G signal, the phone will constantly try to catch the network, which will lead to heating the case and rapid discharge. In such situations, a forced switch to 3G mode can be a salvation, providing more stable, albeit less fast, Internet, and retaining the ability to receive incoming calls without breaks.

The solution to the problem: why 4G does not work

Xiaomi Redmi 9 is not able to see the network 4G or not going online, can be caused by many factors, from banal errors SIM-The first thing you need to do is to rule out physical problems: check if it's tight. SIM-A map in the tray, whether the contacts are contaminated or oxidized, sometimes it helps to simply restart the device, which resets the temporary errors of the communication module.

If the physical connection is fine, you should pay attention to the software settings, maybe the system has lost the parameters of the APN access point, or the operator is doing technical work, and it is also worth checking whether the flight mode is activated and whether the traffic saving feature is enabled, which can block background data transfer, in some cases helps reset network settings to factory values.

⚠️ Note: Resetting network settings will delete all stored Wi-Fi passwords and associated Bluetooth devices, so it is recommended to save important data before performing this operation.

To reset your network settings, go to Settings → Connection & Sharing → Reset Wi-Fi, mobile networks and Bluetooth. Confirm and wait for the reboot of the communication modules. After that, the phone will re-register on the operator’s network, and often this solves the problem of lack of high-speed Internet.

The Impact of LTE on Redmi 9 Autonomousity

Active use of fourth-generation networks has a noticeable impact on the battery life of the Redmi 9. The communication module consumes significantly more energy when transmitting large amounts of data, especially if the signal is unstable and the phone has to constantly increase the power of the transmitter. Users who spend a lot of time on the Internet outside of Wi-Fi should be prepared for more frequent charging of the device.

To minimize the impact of LTE on the battery, there are a few practical tips: First, turn off mobile internet when you don’t need it, or use quick-tuning widgets to do so. Second, you can limit background activity on the Battery menu for applications that don’t require constant connection. Third, in areas without 4G coverage, it’s better to switch to 3G manually so that the phone doesn’t waste resources on endless tower searches.

Statistics show that streaming video over 4G can drain a 5020 mAh battery (which is equipped with Redmi 9) in about 10-12 hours of continuous operation, whereas in standby mode with 4G enabled, the device can last several days. However, with a poor signal, standby time can be reduced by many times due to the high load on the radio module.

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Use the “Flight” mode at night or in places where the network is not caught at all – this will prevent the battery from draining due to the constant attempts of the smartphone to find the base station.

Frequent Questions and Answers (FAQ)

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Proper network type setup and timely resetting of APN settings solve 90% of the problems with the speed and stability of the Internet on Xiaomi Redmi 9.