The modern smartphone has become a digital twin of its owner, storing correspondence, passwords, photographs and exact travel routes. For subscribers of large operators, such as Megafon, privacy issues are especially acute, since the device is constantly online. Users often wonder whether hidden software is installed on their gadget, transmitting data to third parties without the owner’s knowledge.
Anxiety can be caused by the strange behavior of the device: rapid discharge, strange calls, or activation of the microphone at the wrong time. However, panic is not always justified, because many symptoms may indicate banal battery wear or malfunctions of the operating system Android. It is important to learn to distinguish real security threats from technical problems.
In this article we will analyze in detail the algorithms for checking your device for spyware. We will look at both the built-in tools of the system and specific signs that indicate external interference in the operation of your smartphone.
Primary signs of spyware
The first alarm signal is often abnormal behavior operating system. If your phone, which previously worked reliably, suddenly begins to behave unpredictably, it is worth conducting a deep diagnosis. Spyware, or Trojans, require resources to collect and send information, which inevitably affects the performance of the
Pay attention to case temperature. Even in rest mode, when the screen is off and you are doing nothing, the device can become noticeably warm. This happens because the malicious code runs in the background, constantly activating the processor and communication modules to transmit data to a remote server.
Another clear indicator is a sharp increase in mobile traffic consumption. Spyware must send collected data (screenshots, call recordings, geolocation) to attackers. If you notice that the gigabyte package from Megafon has ended much faster than usual, this is a reason to check.
⚠️ Attention: A sharp increase in traffic consumption can be caused not only by viruses, but also by updating applications or the enabled Internet distribution function. Check the statistics in the settings before drawing conclusions.
System processes can be hidden from the average user, but their influence on autonomy cannot be hidden. If the battery charge is reduced by 10-20% overnight in standby mode, this is a critical indicator of hidden activity.
Battery and data consumption analysis
Operating system Android provides powerful tools for monitoring energy consumption. To access this information, you must go to menu Settings → Battery → Battery usage. This displays a list of all applications that have consumed energy over the past day or week.
Examine the list carefully. Look for apps with confusing names or system services that are consuming a disproportionate amount of power. For example, if a simple “Calculator” or “Flashlight” is at the top of the list in terms of charge consumption, this is a clear sign that under the guise of a utility is hidden malicious code.
A similar procedure needs to be done with traffic consumption. Go to section Settings → Network and Internet → Data transfer. Sort apps by amount of data transferred. Spyware often disguises itself as system updates or Google services, but their traffic volume will be suspiciously high for background tasks.
| Symptom | Normal behavior | Suspicious behavior |
|---|---|---|
| Battery discharge | 5-10% per night in sleep mode | More than 20% per night without use |
| Heating | Only under load (games, videos) | Heating in your pocket or on the table |
| Traffic | Corresponds to user activity | Gigabytes in the background |
| Pop-up windows | Only in the browser or specific applications | On the desktop or when unlocked |
Pay special attention to applications that have access to the network, but do not have an icon on the desktop. Such “invisibility” is a classic sign of installed stalkerware (stalkerware). The removal of such apps in the standard way is often blocked by virus developers.
Periodically reset battery usage statistics in the settings to see a fresh picture of energy consumption for the current day, and not accumulated over the month.
Checking administrator rights and special features
For full operation, spyware often requests extended access rights. The most dangerous level is rights device administrator. Having received them, the app can block its removal, prohibit resetting settings and control the screen lock.
To check who has these rights, follow the path Settings → Security → Device Administrators (the path may vary slightly depending on the model Samsung, Xiaomi or Pixel). This list should only contain trusted services, such as Google's Find My Device or corporate clients if the phone is working.
If you see an unknown application with a checkmark in this list, uncheck it immediately. After disabling administrator rights, the application can be uninstalled through the standard application manager. Without this step, the "Delete" button will be inactive or hidden.
⚠️ Attention: Some legitimate antivirus and password managers also require administrator rights to protect data. Do not disable them if you installed these apps yourself.
The second critical section is “Accessibility”. Attackers use this interface to intercept keystrokes (keylogging) and read screen contents. Go to Settings → Accessibility and check the list of enabled services.
Any service whose name is unfamiliar to you or which has a description that does not correspond to its function should be disabled. Viruses are often disguised under names like “System Update Service” or “Wi-Fi Helper”, using system style for disguise.
☑️ Checking access rights
Diagnostics of forwarding and network activity
One of the old, but still working methods of surveillance is call and SMS forwarding. An attacker can set up automatic forwarding of all incoming calls or text messages to his number, while remaining in the shadows.
To check the current forwarding settings on the network Megafon you can use USSD requests. Enter the code *#21# on the phone keypad and press the call button. The system will display the forwarding status for voice, data, faxes and SMS.
*#21# - Checking the forwarding status
##002# - Cancel all types of forwarding
If in response to a request you see an unknown phone number, which means your connection is monitored. To immediately reset all forwarding settings, use the universal cancellation code ##002#. This action is safe and will not affect your data plan.
It is also worth checking your call history for strange outgoing calls that you did not make. Spyware can use your phone to call premium numbers or communicate with the command and control server. Such recordings are often disguised as very short calls lasting 1-2 seconds.
What to do if the code does not work?
If the USSD request fails or you receive a network error, this may mean that a virus is blocking the sending of commands. Try resetting in safe mode or through the call settings menu.
Using antivirus software and scanners
Built-in protection tools Android (Google Play Protect) are good for basic filtering, but they may not be effective against complex targeted attacks. For deep scanning, it is recommended to use specialized anti-virus solutions from well-known vendors, such as Kaspersky, Dr.Web or ESET.
Download the application exclusively from the official store Google Play. Avoid downloading APK files from third-party sites, as this is where modified versions of apps with embedded code are most often distributed. After installation, run a full system scan.
Antiviruses can detect signatures of known Trojans, adware and covert surveillance apps. If a threat is found, follow the application's instructions to neutralize it. In some cases, you may need to delete a malicious file in safe mode.
Antivirus does not guarantee 100% protection against new, unknown threats (Zero-day), but is a mandatory basic level of security for any smartphone.
In addition to a full scan, use the real-time scanning function. It monitors the behavior of installed applications and blocks suspicious activity before it causes damage to your data or account at Megafon.
Radical measures: reset and prevention
If you find obvious signs of surveillance, but cannot remove the virus using standard methods, the only reliable solution is a complete reset of the device to factory settings. This procedure will remove all data, including hidden malware deeply embedded in the system.
Before performing the reset, be sure to save important contacts and photos to an external storage device or cloud storage that you consider safe. Do not restore the backup copy of applications immediately after resetting, as you may return the virus back along with the data.
To perform a reset, go to Settings → System → Reset settings → Delete all data. Confirm the action and wait until the device reboots. After turning on, the phone will be clean, as it was immediately after purchase.
⚠️ Attention: Menu interfaces may differ on different versions of Android. If you cannot find the item you need, use the search in the settings by entering the word “Reset.”
As a preventative measure, never click on suspicious links in SMS from unknown senders, even if they are disguised as messages from Megafon or banks. Do not grant access rights to applications that do not need them (for example, a flashlight does not need access to contacts).
Can the Megafon operator itself monitor me?
The telecom operator sees technical information: which towers you use, the amount of traffic and call history (billing). However, the contents of your messages, correspondence in instant messengers and files on the phone are inaccessible to the operator without a court decision and special equipment.
How to find out if the microphone is hidden?
In modern versions of Android (12 and above), when using the microphone, a green indicator lights up in the upper right corner of the screen. If the indicator is on when you are not talking or using the recorder, check the list of running applications.
What is Safe Mode and how to enter it?
Safe Mode loads only system applications. To enter, hold down the power button, then long press the “Shut down” button on the screen until you are prompted to reboot into safe mode. If the phone works normally in this mode, then the virus is in a third-party application.
Will changing the SIM card help against surveillance?
Changing the SIM card will not remove the virus from the phone's memory. The spyware is installed on the device itself, not on the SIM card. However, changing the number may temporarily stop intercepting calls if forwarding was configured specifically to your old number.