Have you ever Have you noticed that instead of the usual icons 3G or H letters appear in the status bar of your smartphone? Many users are confused by these abbreviations, believing that these are different communication standards, although in reality everything is a little different. LTE? Many users are confused by these abbreviations, believing that these are different communication standards, although in reality everything is a little different. LTE (Long Term Evolution) is a standard for wireless high-speed data transmission for mobile devices and terminals, which is often called "4G", but technically there are nuances between them.
For owners Android-smartphones, understanding the operation of this technology is critically important, since the speed of loading pages, the quality of video calls and the stability of the connection while on the move depend on it. In this article, we will analyze in detail what is hidden behind this abbreviation, why the phone sometimes switches to H+ and how to force the device to work in the fastest possible mode.
The technological essence of LTE and the evolution of standards
Before delving into the menu settings, you need to understand the basic principles of how mobile networks work. Technology development progressed progressively: from analogue communications 1G to the first digital standard 2G (GSM), which made it possible to transmit not only voice, but also text messages. The next stage was 3G, which brought the ability to access the Internet, albeit at low speeds, sufficient for simple mail and text sites.
LTE appeared as a response to the growing needs of users for multimedia content. This is a bridge between the third and fourth generation of communications. Initially, this standard was developed by the 3GPP consortium as an evolutionary development of UMTS/HSPA networks. The main difference is in the network architecture: it has completely switched to packet data transmission IPwhich eliminated the need for circuit switching for voice and allowed for throughput to be achieved up to 326 Mbit/s for downloading in ideal conditions.
It is important to note that "pure" LTE technically does not meet the strict requirements of the International Telecommunication Union (ITU) for full 4G, which provide speeds of up to 1 Gbit/s for stationary objects. That is why, at the beginning of its implementation, marketers and operators called it “4G LTE” with a prefix indicating its transitional status. However, for the user, the difference between LTE Advanced (real 4G) and basic LTE is often invisible without special speed measurements.
⚠️ Attention: The connection speed in networks LTE directly depends on the load on the tower and the distance to it. Even if your smartphone supports maximum frequencies, during rush hour in the city center the speed may drop to 3G due to overload of the channel of the 100th base station.
Key differences between LTE and 4G and other standards
Users often wonder: if LTE is 4G, then why in the settings or on the screen are these designations sometimes separated? The fact is that the term “4G” in everyday life refers to a whole family of standards, including both LTEand the more advanced LTE-Advanced (LTE-A). The latter uses frequency aggregation technology, combining several channels to increase speed, while conventional LTE operates in one frequency range.
Let's consider a comparative table of characteristics of different generations of communication to clearly see the progress:
| Characteristics | 3G (HSPA+) | LTE (4G) | LTE-Advanced (4G+) | 5G NR |
|---|---|---|---|---|
| Max. speed (theor.) | up to 42 Mbit/s | up to 300 Mbit/s | up to 1 Gbit/s | up to 20 Gbit/s |
| Latency (Ping) | 50-100 ms | 20-40 ms | 10-20 ms | 1-10 ms |
| Access technology | CDMA | OFDMA | OFDMA + Aggregation | OFDMA / SC-FDMA |
| VoLTE support | No | Yes | Yes | Yes |
As can be seen from the table, the transition on LTE gives a multiple increase in performance and reduced latency, which is critical for online games and video conferencing. However, it is worth remembering that real performance is always lower than the theoretical maximums specified by equipment manufacturers.
Another important aspect is support for voice calls. In 2G and 3G networks, voice was transmitted over a dedicated channel, and data through packets. In architecture LTE everything is transmitted only as data packets. To make calls, technology has been developed VoLTE (Voice over LTE), which allows you to transmit voice as a data stream within an LTE channel, providing high quality sound and fast dialing.
Why does the phone write H+ instead of LTE: the main reasons
The situation when in the corner of the screen, instead of the treasured LTE icon H+ (or simply H), is familiar to many. This means that your smartphone has automatically switched to the third generation network. This behavior is not always a malfunction; most often this is the normal operation of the radio module algorithms, which searches for the most stable connection.
The first and most common reason is poor coverage of the fourth generation network at a specific point. Radio signal LTE operates at higher frequencies, which are less able to penetrate thick walls and avoid obstacles worse than 3G signals. If you are in a basement, densely built area or far from a tower, the phone resets the connection to H+so as not to lose the connection completely.
The second reason may lie in the settings of the device itself or the SIM card. You may have selected "3G Only" or "2G/3G" in your preferred network type menu. Also, some old SIM cards, released before the mass introduction of 4G, may not support authentication in networks LTE without replacement by the operator.
Try restarting your smartphone or turning on "Airplane mode" for 10 seconds and then turning it off. This will force the modem to re-register with the network and find the nearest tower with the best signal.
Sometimes the problem lies in network congestion. If the base station LTE is overcrowded with subscribers, the operator can force some users to switch to 3G frequencies to unload the channel, even if the 4G signal level remains high.
How to enable and configure LTE on an Android smartphone
Most modern smartphones based on Android support high-speed networks is enabled by default. However, if you encounter a missing LTE, you should check the settings manually. The path to the menu may differ slightly depending on the manufacturer's shell (MIUI, OneUI, ColorOS), but the logic remains the same.
Go to Settings your device. Find the section responsible for connections. It may be called Connections, Network and Internet or Mobile network. Inside this menu you need to find the item Type networks or Preferred network type.
In the list that opens, select the mode containing the marking LTE. Usually this is option 5G/4G/3G/2G (auto) or LTE/3G/2G (auto). It is strictly not recommended to select the "LTE Only" mode unless absolutely necessary, since in this case you will not be able to receive incoming calls if the operator does not support or you have not configured VoLTE.
☑️ Diagnosis of lack of LTE
If the icon does not appear after changing the settings, try removing the SIM card and inserting it again, making sure that the contacts are not dirty. Also check whether the 4G/LTE service is activated in the personal account of your mobile operator, as sometimes it requires a separate connection.
VoLTE technology: voice over LTE
This function deserves special attention VoLTE. As mentioned earlier, networks LTE were originally created only for data transmission. Without VoLTE technology, when making a call, the phone is forced to “fall back” to the 3G or 2G network (CSFB process - Circuit Switched Fallback), which interrupts the high-speed Internet during the call.
Enabling VoLTE allows (simultaneously) to talk and use the Internet at full 4G speed. At the same time, the quality of the voice increases significantly, becoming more natural and clear, and the connection time with the subscriber is reduced. For this function to work, support from three components is required: the telecom operator, your smartphone and the SIM card.
⚠️ Attention: On some smartphone models imported as parallel imports or intended for other markets (for example, Chinese versions without global firmware), the VoLTE enable menu may be hidden. In such cases, activation is possible only through the engineering menu or special applications.
To check the status of the function, go to the mobile network settings. There should be a switch Calls via LTE or VoLTE. If it is not there, but the operator claims support, the function may be activated hidden. Try entering the code in the phone book ##4636## to access the testing menu (does not work on all devices) and check the telephone information settings.
Hidden codes for the engineering menu
On many Android devices the code ##4636## opens the testing menu. There, in the "Phone Information" section, you can force the network type to be set. Be careful: incorrect settings may lead to loss of communication until the network settings are reset.
Frequency bands and equipment compatibility
The concept LTE is not limited to one standard; it operates on many different frequencies called "bands". Telecom operators in different countries and regions use different sets of frequencies to deploy their networks. The most common bands in Russia and the CIS are B3 (1800 MHz), B7 (2600 MHz) i B20 (800 MHz).
The problem arises when you buy a smartphone intended for the US or Chinese market and bring it to us. The device may physically support the technology LTE, but may not have antennas and modem modules to operate on specific frequencies of your operator. As a result, the phone will see the network, but will not be able to connect to 4G, remaining in 3G mode.
Before purchasing a new device, always check the list of supported frequencies (LTE FDD bands) on the manufacturer's website with the frequencies used by your operator in your region of residence. This information is usually available in the technical specifications under "Communications" or "Networks".
The presence of the 4G/LTE icon does not guarantee high speed. Actual performance depends on the compatibility of the frequencies (bends) of your smartphone with the operator’s equipment in a particular area.
The impact of LTE on power consumption and network search
The use of high-speed networks LTE has a noticeable impact on the battery life of a smartphone. A modem operating in 4G mode consumes more power than when operating in 2G or 3G, especially in areas with poor reception. When the signal is weak, the device constantly increases the transmitter power and actively scans the airwaves in search of the best base station.
If you are in an area where coverage LTE is unstable (for example, at the border of the coverage area), the phone may constantly “jump” between 4G and 3G standards. This process of re-registering with the network is one of the most energy-consuming scenarios, capable of draining the battery in a few hours even in standby mode.
In such situations, it is advisable to manually switch the network type in the settings to 3G/2G (auto). This will stabilize the connection, stop constantly searching for a signal and significantly extend the life of the battery, although the Internet speed will decrease. For background tasks, such as instant messengers or mail, 3G speed is often quite sufficient.
⚠️ Attention: Settings interfaces and menu item names may change with the release of new versions of Android and shell updates from manufacturers. If you do not find the described items, use the search in the phone settings by entering the request “Mobile network” or “Network type”.
FAQ: Frequently asked questions about LTE on Android
Is constant use of LTE harmful to health?
Currently, the World Health Organization and the scientific community have no evidence of harm the impact of radio frequency radiation of standards LTE and 4G on human health while observing safety standards. The radiation power of a smartphone is strictly regulated by international standards and is within acceptable limits.
Why does LTE speed drop in the evening?
In the evening, the load on the network increases: users return home and begin to actively watch videos, play and download files. The base station's bandwidth is divided among all connected subscribers, so the individual speed of each user is reduced. This is a feature of the cellular communication architecture, and not a breakdown of the phone.
Is it possible to use LTE abroad?
Yes, this is possible provided that your operator has entered into roaming agreements with foreign partners, and your smartphone supports the frequencies (bends) used in the host country. Make sure that “Data Roaming” is enabled in the settings, otherwise the Internet will not work, even if the icon LTE is displayed.
What to do if LTE is working, but the Internet is not loading?
Check your account balance and the availability of an connected tariff plan with the Internet. Then go to Settings → Mobile network → Access points (APN). Make sure you select the correct access point for your carrier. If the settings are lost, press the menu (three dots) and select "Reset settings" or "Restore to default".
Does LTE differ on different operators?
Technically the standard is the same, but the quality of communication depends on operator infrastructure: number of towers, their location and equipment used. One operator can provide stable LTE in the city center, but lose the signal beyond the Moscow Ring Road, while another will work differently. The choice of operator depends on the specific location.