The threat of digital espionage has today become a reality, which is faced not only by politicians and businessmen, but also by ordinary users. If you notice that your smartphone is running slower, the battery is draining within a couple of hours, or outgoing calls are dropping out strangely, this could be a sign of malware. Checking your phone for wiretapping This is a critical process for maintaining your privacy and the security of your personal data.
Modern spyware such as like Pegasus or simpler Trojans, can hide deep in the system, intercepting SMS, conversations and geolocation. Fortunately, the operating system Android has many built-in tools and third-party utilities that allow you to identify threats without having to pay hackers or service centers. In this article, we will analyze a step-by-step algorithm of actions.
Primary signs of device infection
Before running complex technical checks, you should carefully analyze the behavior of your gadget. Malware designed for data interceptionalways consumes system resources. This is due to the fact that apps are constantly running in the background, transmitting information to a remote server.
Pay attention to the battery indicator. If the phone heats up even at rest or the charge melts before your eyes without actively using the screen, this is an alarm bell. You should also be wary if the device starts to reboot on its own or turns on the screen in the dark.
⚠️ Attention: Do not ignore strange sounds during a call. Clicks, static, or echoes may indicate that the line is being monitored or a third-party recording of the conversation is enabled.
Another obvious symptom is an unexpected increase in traffic. Spyware must send the collected data (photos, audio, correspondence) to developers. If your telecom operator sends notifications about exceeding your Internet limit, although you have not downloaded movies, it is worth checking traffic consumption by application.
Use of engineering codes for diagnostics
Operating system Android provides users with access to hidden menus through special USSD commands. These codes allow you to check the status of call forwarding, which is one of the most common wiretapping methods. Attackers often set up forwarding of your calls to their number in order to hear all conversations.
To start checking, 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 voice, data, fax and SMS forwarding. If the status next to any of the items is “On” and a number unknown to you is indicated, this is direct evidence of interference.
It is also useful to use a code *#62#that shows where calls are forwarded when your phone is turned off or is out of network coverage. Often the operator's voicemail number is indicated there, which is the norm, but if a mobile number appears there, this is a cause for concern.
To reset all types of forwarding, use the universal code ##002#. It will disable all call forwarding to third-party numbers.
Don't forget about the code ##4636##that opens the testing menu. Here you can view detailed statistics on your phone and Wi-Fi usage. However, remember that on some modern smartphone models, especially from Chinese manufacturers, these codes may be blocked by the manufacturer.
Analysis of the application manager and access rights
The most reliable way to find a hidden app is a thorough audit of installed applications. Spyware is often disguised as system services or harmless utilities like Flashlight or Calculator. Go to Settings → Applications and carefully study the full list.
Look for applications without an icon or with a name consisting of a set of characters. Pay special attention to apps that have device administrator rights. Go to section Security → Device Administrators. If there is an unfamiliar application that you cannot remove in the usual way, immediately revoke its rights.
- 🔍 Checking access rights: Go to the privacy settings and see which applications are allowed access to the microphone, camera and geolocation. Excess rights for simple games or utilities is a red flag.
- 📉 Battery consumption analysis: In the battery menu, find the applications that consume the most energy. Spies often take the first lines of the rating, even if you have not used them.
- 📦 Search for unknown APKs: Check the “Downloads” folder for installation files that you have not downloaded. Sometimes malicious code is hidden there.
If you find a suspicious application, try deleting it. If the “Delete” button is inactive, it means that the app has received superuser or administrator rights. In this case, you must first disable the rights in the corresponding menu, and then uninstall.
☑️ Checklist for checking applications
Checking network activity and traffic
Any surveillance app must transfer collected data to an external network. Even if the virus is running in the background, it creates network connections. The built-in traffic monitor Android allows you to track which application and how many megabytes were consumed in the background.
Go to the section Settings → Connections → Data usage. Here you will see a graph of traffic consumption for the current month. Click on a specific application to see the details: how much was spent in the background and how much was spent during active use. If Calculator or Notepad transferred 50 MB of data in the background, this is an anomaly.
| Application | Background traffic | Active traffic | Status |
|---|---|---|---|
| 150 MB | 2.5 GB | Normal | |
| System Update | 0 MB | 0 MB | Normal |
| Flashlight Pro | 320 MB | 0 MB | Dangerous |
| Google Maps | 45 MB | 120 MB | Normal |
For a deeper analysis, you can use third-party network monitors, such as NetGuard or GlassWire. These utilities show not only the volume of traffic, but also the IP addresses of the servers your device communicates with. Suspicious connections to servers in unknown jurisdictions may indicate a data leak.
⚠️ Attention: Some system processes (for example Google Play Services) also consume traffic in the background for synchronization. Do not delete them if you are not sure of the purpose of the process.
Scanning with antiviruses and specialized utilities
Manual scanning is effective, but does not always detect complex rootkits. For comprehensive protection, it is recommended to use specialized software. The store Google Play offers many solutions, but not all of them are equally useful.
It is recommended to install one of the recognized antiviruses, such as Kaspersky Internet Security, Dr.Web Light or ESET Mobile Security. Run a full system scan. These apps have signature databases of well-known spyware, such as FlexiSPY or mSpy.
There are also utilities created specifically for searching for stalkerware. For example, a project Incognito from the organization Against Stalkerware helps identify applications that are often used for domestic violence and surveillance. They know how to find apps that regular antiviruses might miss, considering them to be legitimate parental control tools.
Why might an antivirus not find a virus?
Modern spies use techniques of code obfuscation and masquerading as system processes. They may be temporarily disabled when running a security scanner to remain undetected.
If your antivirus detects a threat, follow its quarantine or removal recommendations. After cleaning, be sure to reboot the device and rescan to ensure that the malicious code is completely destroyed.
Radical measures: Reset to factory settings
If none of the methods helped, but suspicions remain, or if you have discovered a virus that cannot be removed, the last and most effective option remains. A full device reset (Factory Reset) is guaranteed to remove any third-party software, returning the phone to a "as-store" state.
Before performing this procedure, it is critical to save all important data: photos, contacts and documents. However, be careful not to restore your app backup immediately after the reset. The virus could be saved in the backup, and you will infect a clean phone again.
Settings → System → Reset settings → Delete all data (reset to factory settings)After the reset, set up the phone as a new device. Log in to your Google account, but install applications manually only from the official store. Avoid installing APK files from unverified sources in the first days of use.
A full reset is a 100% guarantee of removing viruses, but it takes time to restore settings and data. This is a last resort when other methods have not worked.
⚠️ Attention: Before resetting, be sure to remove the SIM card and microSD memory card. Viruses are sometimes able to write their files to an external drive, which will allow them to return to the system after formatting the internal memory.
Prevention and protection from future surveillance
After successfully cleaning the device, it is important to take measures to prevent the situation from happening again. Digital hygiene should become a habit. Never give an unlocked phone to strangers, even for a minute, as installing spyware only takes a few minutes.
Regularly update the operating system and installed applications. Developers Android constantly close security vulnerabilities that hackers exploit. It is also recommended to set a strong password or biometric protection (fingerprint, Face ID) to log into the device.
- 🔒 Two-factor authentication: Enable 2FA for all important accounts (Google, social networks, banks). This will protect your data even if the phone is compromised again.
- 🚫 Prohibit installation from unknown sources: Make sure that the security settings prohibit the installation of applications not from Google Play.
- 👁️ Privacy indicators: In new versions of Android There are green dots in the corner of the screen indicating that the camera or microphone is working. Always monitor their appearance.
Remember that absolute security does not exist, but following these rules will make life much more difficult for attackers. If you suspect that you are being monitored as part of domestic violence or stalking, contact specialized organizations for help.
Can a phone listen to me without the Internet?
Technically, the microphone can be activated and record sound without connecting to the network, but the device will not be able to transmit this data to the spy until it is connected to Wi-Fi or a mobile network. The recordings will be saved in the phone's memory.
How to find out if forwarding to someone else's number is enabled?
Use the USSD code *#21#. If the menu displays the status “Enabled” and a number is indicated that does not belong to you, it means that your calls and SMS are being forwarded to third parties.
Will changing the SIM card help against surveillance?
Changing the SIM card will not remove the virus from the phone’s memory. Spyware is installed on the device itself and will continue to work with the new SIM card, it will simply start transmitting data from a new number.
Is it safe to use free antiviruses?
Free versions of well-known antiviruses (Avast, Kaspersky, Dr.Web) are quite effective for basic protection. However, they may not have the search functions for complex stalkerware that are available in paid versions.