How to check MTS wiretapping on Android for free

The issue of digital privacy today is more pressing than ever. Many smartphone owners, especially subscribers of large operators such as MTS, are beginning to worry about who has access to their conversations and correspondence. The fear that a conversation may be recorded by third parties is often based on the real risks of installing malicious software, and not on the capabilities of the telecom operator itself.

It is important to immediately clarify the key point: legal wiretapping of subscribers by a telecom operator without court approval is impossible in Russia. The technical architecture of networks GSM and LTE is protected from external interception at the signal encryption level. However, this does not eliminate the risk that a spy application could be installed on your smartphone, which intercepts the sound of the microphone and sends data to attackers.

In this article, we will look in detail at how to check whether an MTS phone on Android is being tapped for free, using the system’s built-in tools and special utilities. We will not consider paid services, but will focus on effective self-diagnosis methods available to every user right now.

Signs of spyware on a device

Before moving on to technical checks, it is worth analyzing the behavior of your gadget. Malicious apps that intercept audio or data consume system resources. If you notice that the battery is draining much faster than usual, even in standby mode, this is the first alarm bell. Background recording and file transfer require constant operation of the processor and communication module.

Another characteristic symptom is overheating of the case. When the phone is lying on the table and not in use, but it is warm or even hot, it means that active processes are going on inside. This could be cryptocurrency mining or, more likely in the context of our topic, the work of a hidden Trojan transmitting information to a remote server.

Pay attention to strange sounds during a conversation. While interference is often caused by poor call quality, regular clicks, static noise, or an echo of your own voice may indicate interference with the audio channel. You should also be wary if the phone turns on or off for a long time - the virus needs time to start its services or correctly terminate the data transfer session.

⚠️ Attention: Do not confuse technical network failures with signs of wiretapping. If you are in an area with poor signal reception, audio artifacts are normal. However, the combination of poor connection and rapid battery drain requires checking.

Check the list of installed applications. Spyware often disguises itself as system utilities with names like "System Update", "WiFi Service" or "Media Player", but without an icon or with a generic icon. Go to the settings and carefully study each item.

Using USSD codes for network diagnostics

One ​​of the fastest and free ways to check the status of forwarding and active services is to use special engineering codes. The operator MTS, like other cellular companies, supports standard GSM commands that allow you to see where your calls are redirected. Attackers often use forwarding to duplicate your calls to their number.

Open the "Phone" application and enter the command *#21#. After pressing the call button, a window will appear on the screen with information about the status of unconditional forwarding. If opposite the items “Voice”, “Data”, “Fax” and others there is a status of “Not forwarded” or the number of your voice box, then everything is in order.

For a deeper check, use the code *#62#. This command shows where the call is transferred if your phone is turned off or out of range. This usually contains the operator's message center number. If you see an unfamiliar landline or mobile number, this is a cause for serious concern.

There is also a code *#06#that shows the unique device identifier IMEI. Check these numbers with those indicated on the phone box or under the battery (if it is removable). The match guarantees that your ID has not been replaced programmatically, although this is a rare practice for regular wiretapping.

USSD command	Function	Normal result
*#21#	Checking unconditional forwarding	Status "Not forwarded"
*#62#	Forwarding when unavailable	MTS voicemail number
*#67#	Forwarding when busy	Voicemail number or disabled
##002#	Reset all forwarding	Message about successful deletion

Analysis of application access rights in Android settings

Modern versions of the operating system Android provide users with powerful tools for privacy control. Any application that wants to record your conversation or turn on the microphone must have the appropriate permission. Checking these rights is a mandatory diagnostic step.

Go to the menu Settings → Applications → Access to functions (the path may differ slightly depending on the smartphone model, for example, Samsung or Xiaomi). Find the Microphone section. A complete list of apps that have access to audio recording will be displayed here.

Please study this list carefully. If you see a voice recorder, instant messengers or social networks there, that’s normal. But if the Calculator, Flashlight, or a app with an unclear name that you did not install has access to the microphone, this is a critical vulnerability. Immediately revoke permission and uninstall this software.

⚠️ Attention: Some system applications may have access to the microphone for voice assistant operation. Do not remove system components if you are not sure of their purpose; it is better to simply disable access for them.

It is also worth checking the "Accessibility" section. Malware often uses this section to gain rights to control the screen and intercept keystrokes. If there are unknown services with administrator rights or access to the interface, this is a sure sign of infection.

Monitoring traffic consumption and background activity

Spyware cannot store an infinite number of call recordings in the phone's memory. He needs to transfer this data to the attacker’s server. Consequently, such a app will actively consume Internet traffic, even if you do not use it yourself.

Go to the connection settings and find the “Data transfer” or “mobile data use” item. Sort applications by the amount of traffic spent for the current month. Pay attention to apps that are at the top of the list, but which you hardly used.

Pay special attention to background traffic. In each app's data usage details, you can see how many megabytes were used when the screen was turned off. If a simple text editor or game has transferred hundreds of megabytes in the background, this is an anomaly that requires removing the application.

Also, check the list of running processes. In the section Settings → For developers → Running services (you first need to activate the developer mode by clicking 7 times on the build number in the "About phone" section) you can see what exactly is running right now. The presence of services with names containing the words "track", "spy", "monitor" or a random set of characters indicates infection.

How to hide the virus icon?

Hackers often app malware so that after installation it hides its icon from the general menu. Therefore, checking through application settings is more important than a visual inspection of the desktop.

Checking for root access and system changes

To fully wiretap a phone, especially by bypassing Android system protections, attackers often require root access (superuser rights). If you have never intentionally obtained these rights, but they are active, then someone has hacked your device.

Install a simple application for checking root access from the official store Google Play for example, "Root Checker". Launch it and click the test button. If the app reports that superuser access has been granted, but you did not do this, the device is compromised.

Having root access allows malware to hide deeper in the system, beyond the sight of conventional antiviruses and task managers. In this case, a simple uninstall procedure may not work. A full factory reset will be required to clear the system partition.

⚠️ Warning: Rooting your device yourself may void your device's warranty and make it more vulnerable to future attacks. Do this only if you fully understand the risks.

Also check if there are any unknown security certificates installed on your phone. Go to Settings → Security → Encryption and Credentials → Trusted Credentials. If you see certificates issued by unknown organizations or with strange names, delete them. They can be used to intercept encrypted traffic (MITM attacks).

Radical protection measures and resetting settings

If a comprehensive scan reveals suspicious activity, but the malicious application cannot be removed (it returns after removal or the “Delete” button is inactive), you need to resort to radical measures. The most reliable way to get rid of any wiretapping is to completely reset the device to factory settings (Hard Reset).

Before this procedure, be sure to save important contacts and photos to external media or to the cloud, but do not make a full backup of the system, as you may save the virus along with the data. After the reset, the phone will return to its out-of-the-box state and all hidden bookmarks will be destroyed.

After the reset, set up the phone as a new device. Do not restore applications from an old backup immediately. Install apps manually only from trusted sources. This will ensure that you do not put an infected file back on a clean system.

To prevent future attacks, install a reliable antivirus from a reputable vendor such as Kaspersky, Dr.Web or ESET. Update your Android operating system regularly, as manufacturers are constantly closing vulnerabilities through which hackers gain access to the microphone.

Why does a reset help?

Eavesdropping viruses are usually stored in the user memory section. When data is formatted, this partition is completely cleared. System viruses are extremely rare and require complex flashing.

Frequently asked questions (FAQ)

Can the MTS operator wiretap me without my knowledge?

No, the telecom operator does not have the right or technical ability to wiretap subscribers without court approval. All conversations are encrypted during transmission from the phone to the tower. If you hear interference, this is a signal quality problem, and not the work of special services through the operator.

Will an antivirus help you find a wiretapping app?

Modern mobile antiviruses effectively find known types of spyware (Trojans, stealers). However, if the virus was written specifically for you or is unique (zero-day), the antivirus may miss it. Therefore, comprehensive verification through the settings is important.

Is it safe to enter USSD verification codes?

Absolutely safe. These codes are standard GSM network commands and are processed by the phone itself or the operator's network. They cannot infect the phone or write off money from the account.

What should I do if I found someone else's number in the forwarding?

Urgently dial the command ##002# to cancel all forwardings. After this, change the password for your MTS personal account and check your phone for viruses, since redirection could be installed remotely through malware.

Is it possible to listen to a phone only by number without installing apps?

Technically, this is impossible for an ordinary citizen. Rumors about services that allow you to listen to anyone by entering only a number are a scam. Real interception is only possible with physical access to the phone to set a bookmark.