In the era of digital transparency, concerns about the privacy of personal data are becoming increasingly valid. Network users Megafon often wonder how to check for wiretapping on their device running Android. The range of threats ranges from the banal collection of data by advertising networks to the installation of specialized spyware by attackers.
Do not confuse the technical features of the cellular network and legal traffic monitoring by the operator with illegal surveillance. Cellular communications by its nature it involves the transfer of data through base stations, which technically allows you to identify the location subscriber However, the real threat often comes not from the service provider, but from malicious software installed directly on your gadget.
Understanding the difference between system processes and the activities of third parties is the first step to security. In this article, we will analyze in detail the diagnostic methods available to the average user and explain which tools really work and which are myths.
Symptoms of infection and indirect signs of hacking
It can be difficult to determine the presence of spyware (stalkerware) without special utilities, since the developers of such apps disguise them as system processes. However, there are indirect signs that, if ignored, could cost you your privacy. The first alarm bell is often the abnormal behavior of the device itself.
Pay attention to the rate of battery discharge. If your smartphone, which previously worked quietly all day, now requires recharging by lunchtime, this is a cause for concern. Spy applications constantly transmit data to a remote server, which creates a high load on the processor and communication module.
⚠️ Attention: A sharp decrease in autonomy can be caused not only viruses, but also battery wear or background operation of legitimate applications after a system update.
It is also worth analyzing traffic consumption. Go to settings and check your internet usage statistics. Unknown applications that consume megabytes of data in the background can transmit your call recordings or screenshots.
- 🔋 Rapid battery drain even in standby mode.
- 📈 Inexplicable increase in mobile traffic consumption.
- 🔥 Extreme heating of the phone body without active actions user.
- 📞 Extraneous noises, clicks or echoes during calls.
Sometimes the device may reboot itself or turn on the screen in the dark. This is a clear sign that some process is trying to access the microphone or camera. In such cases, it is necessary to immediately conduct a deep check of the system.
Using USSD codes and engineering menu
One of the most accessible methods of primary diagnosis is the use of special service codes. They allow you to forward calls and check the status of call forwarding, which is often used by attackers to intercept incoming calls.
Enter the code on the phone keypad *#21# and press the call button. The screen will display information about whether your voice calls, SMS or data are forwarded to another number. If you see an unknown number or the “Not Forwarded” status does not match your settings, this is an alarming signal.
For a deeper analysis, you can use the code ##4636##. This combination opens the hidden Android engineering menu, which contains detailed information about the phone's performance, battery and usage statistics. Here you can see which applications have accessed the phone recently.
The engineering menu may differ on different smartphone models. On some Samsung or Xiaomi devices, this code may be blocked by the manufacturer.
There is also a code ##002#that is designed to cancel all types of forwarding. Its use is safe and does not delete your personal data, but resets call forwarding settings to factory settings.
⚠️ Attention: The engineering menu interface and the set of available codes may vary depending on the version of Android and the firmware of the Megafon operator. Do not change settings in sections whose purpose you do not know.
Remember that these codes only help identify call forwarding. They are not able to detect complex Trojans that record conversations directly on the device and send them over the Internet without using the operator's forwarding channels.
Analysis of installed applications and access rights
The most effective method of searching for wiretapping is a manual audit of installed software. Spyware is often disguised as harmless utilities: "Flashlight", "Calculator", "Memory Cleaner" or system services with names like "Update Service".
Go to the section Settings → Applications and carefully study the full list. Sort apps by installation date. If you see a app that you did not install yourself, or an application with a suspicious name without an icon, this is a reason to immediately remove it.
Pay special attention to access rights. Go to your privacy settings and check the "Privacy Manager" or "Application Permissions" section. Find the "Microphone" and "Phone" categories. See which apps are allowed to record sound or make calls.
☑️ Check application permissions
If a regular flashlight or game requires access to the microphone, contacts and call history, this is a clear violation of the logic of the application. In modern Android, the system warns about such requests, but attackers often bypass these restrictions using vulnerabilities or social engineering.
| Application type | Normal rights | Suspicious rights | Action |
|---|---|---|---|
| Flashlight | No special rights | Microphone, Contacts | Delete |
| Messenger | Microphone, Camera | Device administrator | Check |
| Game | Memory (cache) | SMS, Phone | Delete |
| Antivirus | Full control | No (unless it is an antivirus) | Check signature |
Removing malware can be difficult if it has received device administrator rights. In this case, you must first go to Settings → Security → Device administrators and uncheck the suspicious application, and only then delete it.
Scanning via Google Play Protect and antiviruses
Google Play Protect's built-in security system runs in the background on most Android devices and regularly scans installed apps for threats. This is the first line of defense that should not be ignored.
To start a manual scan, open the application Google Play Market, click on the profile icon and select "Play Protection". Click the "Check" button. The system will scan all installed apps and compare them with a database of known threats.
However, built-in tools are not always able to detect complex targeted attacks or new modifications of spyware. To increase the level of security, it is recommended to install a specialized antivirus from a well-known vendor, such as Kaspersky, Dr.Web or ESET.
Why may antiviruses not find a virus?
Some advanced spyware use rootkit techniques, hiding their processes from standard scanning tools, or masquerading as system files signed digitally certificates.
When choosing an antivirus, avoid little-known free solutions from unverified sources. Often these “protectors” are data collectors themselves. Download security software only from the official application store.
Regular updating of the antivirus database is critically important. New threats appear daily, and the signature database must be current at the time of scanning. Do not delay updating after installing the application.
Resetting settings as a radical cleaning method
If you suspect a deep infection that cannot be removed using standard methods, the only guaranteed cleaning method is to completely reset the device to factory settings (Hard Reset). This procedure deletes all data and returns the phone to its original state.
Before performing a reset, be sure to back up your important data: photos, contacts, and documents. However, do not restore the backup of applications immediately after resetting, as you may return the virus along with the data.
The reset procedure is usually located in the menu Settings → System → Reset settings → Delete all data. The path may differ on different models, but the essence remains the same: complete formatting of the user memory section.
⚠️ Attention: After the reset, the phone will be completely clean. Make sure you remember the password for your Google account, since without it, activation of the device will not be possible due to FRP (Factory Reset Protection) protection.
After the reset, install only necessary applications from trusted sources. Observe the behavior of the system for several days. If the symptoms of wiretapping disappear, then the problem was in the software.
A full reset removes 99% of types of spyware, but does not protect against re-infection unless you change your passwords and application installation habits.
Prevention and protection from future threats
Smartphone security is a continuous process, not a one-time action. After cleaning the device, it is important to implement rules of digital hygiene to minimize the risks of re-infection.
Never install applications from third-party sources (APK files from browsers or instant messengers) unless absolutely necessary. The official Google Play store checks applications, which significantly reduces the risk of downloading a virus.
Regularly update the Android operating system and all installed applications. Developers are constantly closing security vulnerabilities that hackers exploit. Outdated software is an open door for attackers.
- 🔒 Use a complex password or biometrics to lock the screen.
- 🚫 Disable installation from unknown sources in the settings.
- 🔄 Update Google Play security regularly.
- 👀 Check the access rights of new applications before installing.
Be careful with links in SMS and messenger messages. Phishing links may lead to sites offering to install an “update” or “antivirus” that is actually malware.
If you use public Wi-Fi networks, avoid entering sensitive data or use VPN services to encrypt traffic. This will make it more difficult for network sniffers to intercept data.
Turn on Find My Device in Google Settings. This will allow you not only to track a lost phone, but also to remotely erase all data from it in case of theft or compromise.
Frequently asked questions (FAQ)
Can the Megafon operator listen to my conversations?
The telecom operator technically has access to traffic, but eavesdropping conversations between citizens without court approval is prohibited by Russian law. The operator stores metadata (who called, to whom and when) in accordance with the Yarovaya law, but the content of conversations is not analyzed in real time without the decision of the special services.
Will the *#21# codes help detect a virus on the phone?
The *#21# code shows only the call forwarding settings. It cannot detect viruses, Trojans or spyware applications that record conversations directly on the device and send them over the Internet.
What to do if the phone does not remove a suspicious application?
Most likely, the application has received device administrator rights. Go to the security settings, find the "Device Administrators" section, uncheck the desired application, and then try to remove it again through the app menu.
Is it safe to use public Wi-Fi networks for banking?
No, it is not safe. Attackers can intercept traffic on open networks. For financial transactions, always use the mobile data (4G/5G) or a reliable VPN service with data encryption.
How to check if the microphone is secretly turned on?
In modern versions of Android (starting from version 12), a green dot or indicator lights up in the upper right corner of the screen when the microphone or camera is being used by an application. If the indicator is on when you are not using these functions, check the list of active applications.