The modern smartphone has become the center of digital life, storing confidential correspondence, banking data and personal photos, which makes the threat of remote surveillance extremely relevant for many users.
Many device owners are wondering how to find out if an Android phone is being tapped, using special combinations of numbers known as USSD codes to quickly diagnose the security status.
In this article we will look at real verification methods, from engineering menus to traffic analysis, and explain which myths have no technical basis.
The real threat of espionage on Android devices
There is a persistent misconception that anyone can wiretap a phone simply by knowing the number, but in reality, implementation spyware requires physical access or action by the user.
Cybersecurity experts note that most cases of "wiretapping" are associated with the installation of Trojan apps disguised as useful utilities or games from unverified sources.
⚠️ Attention: Not a single USSD code can remove a virus or disable an already running spyware embedded deep into the system.
Understanding the nature of the threat is the first step to protection, since classical methods of intercepting GSM traffic require expensive equipment and are available mainly to intelligence agencies.
The average user is more often faced with commercial surveillance software that transmits data via the Internet rather than through a voice communication channel.
Myths and truth about USSD codes for verification
There are many lists of “secret codes” circulating on the Internet that supposedly show who listens to your conversation, but most of them have nothing to do with security.
For example, the popular combination *#21# really works, but it only displays the forwarding status of calls, SMS and data, and not the presence of hidden listening.
Using the code *#62# allows you to find out where calls are redirected when your phone is turned off or out of network coverage, which is also often confused with surveillance.
Why don’t codes show spies?
USSD requests work at the level of the telecom operator and basic telephony. Spyware (stealers) work at the level of the Android operating system, gaining access to the microphone and camera through standard APIs, so they are invisible to telephone codes.
It is important to distinguish between technical capabilities: if there was a universal code for detecting all threats, attackers would have long ago found a way to block it.
Instructions: what combinations of numbers to use
Despite the limitations, checking the forwarding settings is a basic step that everyone should take to prevent your calls from being redirected to someone else's number.
To start checking, open the "Phone" application (dialer) and enter the command *#21#, then press the call button.
A table will appear on the screen with statuses for various types of communication: if “Not forwarded” is indicated everywhere, then basic forwarding is disabled.
☑️ Basic security check
#62#If you find an unknown number in the forwarding field, immediately contact your telecom operator to reset the settings.
Other useful code - ##4636##which opens a hidden engineering menu, where in the "Phone Information" section you can see detailed connection statistics.
⚠️ Attention: In the engineering menu ##4636## do not change the radio module settings unnecessarily, this may lead to loss of the network signal.
Some manufacturers, such as Samsung or Xiaomi, can block access to this menu through a standard dialer, requiring the installation of special dialer applications.
Analysis of smartphone behavior and indirect signs
In addition to codes, there are clear signs that your device is controlled by someone else, and you cannot ignore them.
The first alarm bell is an abnormally rapid battery drain, especially if the phone gets warm even in idle mode.
Spyware is constantly active, they record audio, geolocation and send data to the server, which creates a high load on the processor and battery.
- 📉 A sharp drop in autonomy without changing usage habits.
- 📶 An inexplicable increase in mobile traffic consumption.
- 💡 The screen lights up on its own or the phone does not turn off for a long time.
- 🔊 Extraneous clicks or echoes during a conversation.
Having noticed the combination of these symptoms, it is worth conducting a deep diagnosis of the system, and not relying only on external signs.
Often malware is disguised as system processes, so checking the list of running services can provide more information than a visual inspection.
Checking through settings and application manager
The most reliable way to find hidden surveillance is a manual analysis of installed applications and permissions in the system Android.
Go to Settings → Applications and carefully study the full list, paying attention to apps without an icon or with the names of system processes.
Pay special attention to access rights: if a simple calculator or flashlight requires access to the microphone, camera and contacts, this is a clear sign of malware.
| Application | Normal rights | Suspicious rights | Action |
|---|---|---|---|
| Messenger | Microphone, Camera | SMS, Contacts | Check |
| Game | No | Location, Files | Delete |
| Flashlight | Camera (flash) | Microphone, Internet | Delete |
| System service | All rights | - | Do not touch |
In the "Accessibility" section often viruses hide, since this permission gives the app full control over the screen and data input.
Disable the installation of applications from unknown sources in the security settings to block the accidental installation of spyware.
Removing suspicious software sometimes requires switching to safe mode, where only system components are launched.
Radical protection measures and data reset
If you find confirmation of surveillance and cannot remove the malicious file using standard methods, the only option left is a full reset.
The function Hard Reset (factory reset) completely clears the user memory section, deleting all applications and their data.
Before this During the procedure, be sure to save important photos and contacts to the cloud or to your computer, since it will be impossible to restore them after a reset.
After a reset, do not restore applications from a backup copy automatically, as you can return the virus along with the data.
⚠️ Attention: Resetting data does not affect the contents of the SIM card and SD card, so it is better to extract or format them separately.
After returning the phone to its original state, install a reliable antivirus from a reputable vendor and update the system to the latest version.
Prevention: how to avoid wiretapping in the future
The best protection is digital hygiene, which minimizes the risks of infecting the device with malicious code.
Never click on links from SMS from unknown senders and do not download APK files from dubious sites.
Update your operating system regularly, as new security patches close vulnerabilities used by hackers.
Timely updating the Android system closes security holes that are often used by hackers In total, infection occurs.
Using two-factor authentication for a Google account will also add a layer of protection, even if the password is compromised.
Be careful: no combination of numbers can replace common sense when installing new software.
Frequently asked questions (FAQ)
Is it possible to listen to a phone just by number without installing apps?
Technically, this is only possible for intelligence services through the equipment of a telecom operator (SORM/lawful interception). For ordinary citizens and private detectives, this method is not available and is illegal.
Does the code ##002# help against all types of wiretapping?
The code ##002# disables all types of call and data forwarding configured at the network level. This is useful, but does not protect against spyware running inside the smartphone itself.
How to find out who is listening to my conversations?
It is impossible to find out a specific person through the phone. You can only find traces of malware activity (unknown applications, strange traffic), but only law enforcement agencies can identify who is behind the screen.
Is it true that a taped camera protects against surveillance?
A taped camera protects only from visual surveillance. However, spyware can still turn on the microphone, track geolocation and read correspondence, so this is only a partial measure.