How to improve the quality of Tele2 communication on Android

Problems with the quality of mobile communications are a common scenario faced by Tele2 network users on Android devices. Sudden conversation interruptions, low Internet speeds, or a complete lack of network can be caused by many factors: from terrain features to incorrect settings on your smartphone. Understanding the nature of these failures is the first step to restoring a stable connection.

Unlike some other operators, Tele2 actively uses specific frequency ranges that are not always correctly picked up by mobile devices by default. This is especially true for budget models or devices imported from other regions. In this article, we will analyze in detail the mechanisms of operation of the radio module, methods for forcing the selection of a base station, and methods for optimizing software to achieve maximum signal quality.

Before embarking on complex manipulations, it is necessary to eliminate trivial physical causes of poor communication. Often the problem lies not in a software failure, but in simple wear and tear of the equipment or the location of the device in space. We will start with basic diagnostics so that you can accurately determine the vector of further actions and not waste time on unnecessary settings.

Diagnostics of the current state of the network and equipment

First of all, you should evaluate the signal level not by the “sticks” in the corner of the screen, which are often only an approximate graphic illustration, but by real technical parameters. For this purpose, the Android system provides a hidden testing menu, which is accessed by typing a special code. Enter the combination ##4636##in your phone to get to the phone information section.

Here you are interested in the parameters RSRP (Reference Signal Received Power) and SINR (Signal to Interference plus Noise Ratio). The RSRP value shows the strength of the desired signal: if it is below -110 dBm, the connection will be unstable or absent altogether. The SINR parameter reflects the signal to noise ratio; negative values ​​indicate that the useful signal is drowning in interference, which often happens in dense urban areas.

⚠️ Attention: The engineering menu interface may differ on different firmwares. On some Xiaomi or Huawei smartphones, the code ##4636## may not work without installing a special launcher application or obtaining root access.

It is also important to check the physical condition SIM cards. If your Tele2 card was cut from Mini-SIM to Nano-SIM format with scissors, contact with the tray pins may be broken. Microcracks in the chip or oxidation of contacts lead to periodic loss of registration in the network, which the user perceives as “signal loss.”

Setting the preferred network type

Automatic selection of network mode in Android does not always work correctly, especially in areas of poor reception. The smartphone may try to cling to a weak 4G signal instead of switching to stable 3G or even 2G, where voice communication will be clear. Manually setting priorities often solves the problem of “hanging” calls.

To change the network type, go to the menu Settings → Connections → Mobile networks → Network mode. Here you will see a list of available standards. If you are in a rural area or basement where the LTE signal is weak, force select the 3G (WCDMA/GSM)mode. This will provide a more stable voice connection, albeit with a lower Internet speed.

In the engineering menu called by the code ##4636##, you can find more detailed settings in the “Preferred network type” item. For modern Tele2 devices, the optimal choice is often LTE/TD-SCDMA/GSM or LTE/WCDMA/GSM. Avoid 2G-only modes as carriers are phasing out these frequencies in major cities.

• 📶 LTE only: Use only in areas with ideal coverage for maximum internet, but be prepared for problems with voice calls without VoLTE.
• 📞 3G/2G (Auto): Best choice for stable calls in poor signal conditions indoors.
• 🚀 LTE/3G/2G (Auto): Standard mode, which is suitable for most usage scenarios in the city.

Remember that switching modes requires rebooting the radio module. After changing the settings, it is recommended to turn it on Airplane mode for 10-15 seconds and then turn it off so that the phone registers with the network again with the new parameters.

Manual selection of the operator’s base station

Sometimes the smartphone stubbornly clings to a remote tower with overloaded channel, ignoring the nearest Tele2 station with the best signal. In such situations, manual search and selection of an operator helps. This method forces the device to rescan the airwaves and connect to an available network with the best parameters at the moment.

Disable automatic network selection in the menu Settings → Mobile networks → Telecom operators. After disconnecting, it will begin searching for available networks, which may take from 30 seconds to 2 minutes. In the list, find Tele2 or Tele2 RU and click on it to force registration.

If there are several entries in the list with the name Tele2, try connecting to each of them in turn. Different recordings may correspond to different frequency ranges (for example, Band 3, Band 7 or Band 20), which penetrate the walls of buildings differently.

⚠️ Attention: If you manually select an operator, the phone will not automatically switch to roaming partners if you leave the Tele2 coverage area. Don't forget to return automatic selection before traveling to another region.

This method is especially effective at cell boundaries, where the signal from different towers is approximately the same in level, but varies in congestion. Forced registration allows you to “reset” the current connection and establish a new, often better one.

Use of access codes and hidden functions

Tele2 operator provides a number of USSD commands that allow you to manage additional services that affect the quality of communication. For example, activating the “Good beep” service or reconfiguring Internet access profiles can indirectly affect the stability of the connection by updating the configuration on the server side.

To reset the access point (APN) settings to factory values, which often solves problems with slow Internet, use the command *155*00# or restore the settings manually in the mobile network menu. The correct APN settings for Tele2 are critical for 4G operation.

Name: tele2internet
APN: internet.tele2.ru
Username: (blank)
Password: (blank)
Authentication type: PAP or CHAP
APN type: default,supl
APN protocol: IPv4/IPv6

There is also a myth about “secret signal amplification codes”. Most of the codes floating around the Internet (for example, 3001#12345# for iPhone), on Android either do not work or open the same engineering menu. Real gain is achieved only by correctly setting the ranges, which will be discussed below.

Code for resetting network settings

On some devices, the combination ##72786# (SCRTN) works, which performs a complete reset of communication settings. Use with caution as this will delete all saved Wi-Fi passwords and Bluetooth settings.

Selecting frequency ranges (Band Locking)

The most advanced method of improving communication is to block unnecessary frequency ranges. Tele2 in Russia uses mainly the bands Band 3 (1800 MHz), Band 7 (2600 MHz) and Band 20 (800 MHz). Each of them has its own characteristics of signal propagation.

Band 20 (800 MHz) has the best penetration and covers large areas in rural areas. If you are outside the city or in a concrete building, forcing only this band to turn on can give a significant increase in signal level. In contrast, Band 7 provides high speed, but does not pass through walls well.

To control bands on Android, you often need root access and applications like Network Cell Info or Force LTE Only (4G/5G). In the menu of such applications, you can uncheck bands that are not used in your area or create interference, leaving only the most powerful signal from the Tele2 tower.

Band	Frequency	Features	Recommendation
Band 20	800 MHz	High penetrating ability, large coverage area	Ideal for rural areas and premises
Band 3	1800 MHz	Balance of coverage and speed, main range in cities	Universal choice
Band 7	2600 MHz	High speed, short range	Only on the street near the tower
Band 38	2600 MHz (TDD)	Used to unload traffic	Pair with Band 7

⚠️ Attention: Blocking all bands except one can lead to a complete loss of communication if the tower at your location does not broadcast this specific band. Always check the coverage map before the experiment.

Hardware solutions and external antennas

When software methods are exhausted and the signal remains weak, it is worth paying attention to the hardware. The built-in antennas of smartphones have limitations on receiving power. For stationary use in a private home or office, the optimal solution would be to install an external MIMO antenna.

The antenna is connected to the smartphone via a special adapter (pigtail), if the device has the appropriate connector, or is used in conjunction with a 4G router that distributes Wi-Fi. To work with the Tele2 network, you must select an antenna tuned to the operator’s operating frequencies (usually 800, 1800 or 2600 MHz).

When choosing a signal amplifier (repeater), make sure that it is certified for use in the Russian Federation and supports exactly those frequencies that Tele2 broadcasts in your area. An incorrectly configured repeater can interfere with the base station, which will lead to fines and equipment shutdown by the operator.

Also check the case of your smartphone. Metallic cases or cases with magnetic latches can shield the antenna, reducing reception levels by 10-15 dBm. Try removing the case and assessing the change in RSRP indicators in the engineering menu.

Frequently asked questions (FAQ)

Why does the phone show 4G, but the Internet does not work?

This may indicate an overload of the Tele2 base station during peak hours or problems with the access point (APN) settings. Try switching the network mode to 3G and back, and also check your personal account balance.

Does replacing a SIM card affect Tele2 Internet speed?

Yes, old SIM cards (released more than 5 years ago) may not support modern encryption standards and 4G+ frequency bands (frequency aggregation), which limits the maximum speed.

How to enable VoLTE on Android for Tele2?

The VoLTE function depends on the support of the smartphone and firmware. Check for a switch in your mobile network settings. If it is not there, you may need to activate the service on the operator’s side through your personal account or the My Tele2 application.

Is it safe to use engineering codes to configure the network?

Viewing parameters in the engineering menu is safe. However, changing values ​​in fields that you do not understand (for example, transmitter power) may cause the communication module to not work correctly. Return the settings to default values ​​in case of any failures.

What to do if even an external antenna does not help?

If an external antenna does not work, perhaps the nearest Tele2 tower is too far away or is shielded by the terrain. In this case, it makes sense to consider connecting your home Internet from another provider or using a satellite phone for emergency communication.