The modern smartphone has turned into a repository for our digital life, containing correspondence, banking information, geolocation and personal photos. That is why the topic of how to see if an Android phone is wiretapped is becoming critically important for millions of users. The threat comes not only from professional hackers, but also from banal spyware applications that can be installed by attackers or even unscrupulous acquaintances.
Understanding that your device is under control can be difficult, since malicious software is often disguised as system processes. However, the operating system Android has a number of vulnerabilities and features that can indicate the presence of third-party software. In this article, we will take a detailed look at technical indicators of compromise, manual diagnostic methods, and tools to protect your privacy.
Main symptoms of device infection
The first warning sign that should alert the gadget owner is abnormal system behavior. If you notice that Battery usage has increased dramatically for no apparent reason, this may indicate that a hidden miner or data transfer module is running in the background. Spyware requires constant access to the microphone, camera and network, which places a high load on the processor and battery.
Another alarming sign is the unexpected heating of the case, even at rest. When the phone is on the table and the screen is turned off, but the device is hot to the touch, it means that some background processes actively use hardware resources. This is a classic symptom of Trojans that continuously record audio or track location.
⚠️ Attention: If your phone starts to reboot spontaneously, turn on the screen in your pocket, or make strange clicking sounds during a call, immediately conduct a full security check.
It is also worth paying attention to outgoing traffic. A surge in mobile data or Wi-Fi consumption could mean that information collected from your device is being sent to a remote attacker's server. You can check this in the data usage settings, where strange applications with huge traffic consumption are often visible.
Diagnostics through engineering codes and USSD requests
The operating system provides users with access to hidden diagnostic menus that help identify call and SMS redirection. This is one of the fastest ways to understand whether your number is forwarded to a third-party device. To do this, you need to open the “Phone” application and enter special combinations of characters.
The most common code is *#21#. After entering this combination, the screen will display the status of all types of forwarding: voice calls, text messages, faxes and data. If any item has the status “Enabled” and a number unknown to you is indicated, this is a clear sign that your communications are being intercepted.
Before entering codes, make sure that you have a balance or a network connection, since some telecom operators may treat USSD requests as paid services, although most diagnostic codes are free.
Additionally, you can use code *#62#that shows where calls are redirected if your phone is turned off or out of range. Fraudsters often set up forwarding specifically for this scenario so as not to miss important calls addressed to you. If the number in the “Voice Communication” field is different from the voicemail number of your operator, you should immediately cancel this setting.
How to cancel forwarding?
To reset all forwarding settings, enter the universal code ##002# and press the call button. This action will return all settings to factory defaults and disable redirection of calls and SMS to third-party numbers.
Analysis of installed applications and access rights
Most surveillance apps work like regular applications, but try to hide their presence. They may not have a desktop icon or may disguise themselves as system utilities with names like "System Update", "Wi-Fi Service" or "Android Core". To find such a hidden spy, you need to carefully study the list of all installed software.
Go to the section Settings → Applications → All applications. Carefully scroll through the list, paying attention to apps without icons or with suspicious names. If you see an application that you didn't install or a system process with a high power consumption rating that shouldn't be in the stock firmware, this is a cause for concern.
Particular attention should be paid to access rights, especially permissions to Accessibility (Accessibility). Many viruses require these rights to intercept keystrokes (keylogging) and read screen contents. Go to Settings → Accessibility and check which services are activated. Any unknown service with the switch enabled should be immediately disabled and uninstalled.
☑️ Check permissions
| Permission type | What is it used for legally | Risk of abuse |
|---|---|---|
| Microphone | Dictaphone, calls, voice assistant | Listening to indoor conversations |
| Camera | Photos, video calls, QR scanner | Secret shooting through the front camera |
| Geolocation | Maps, navigator, taxi | Tracking movements in real time |
| Special features | Screen narrators, gesture control | Password interception and full control over the OS |
Checking the activity of device administrators
Advanced spyware often receives rights device administrator, allowing them to block removal, reset screen passwords, and prevent antivirus apps from working. The presence of an unknown administrator in the system is a critical level of threat that requires immediate response.
To check the list of administrators, go to the menu Settings → Security → Device Administrators (the path may vary slightly depending on the model Samsung, Xiaomi or Pixel). This list should only show trusted services, such as Google's Find My Device or corporate email clients if the phone is working.
If you find an application here with a suspicious name or no name at all, try unchecking it. If the system does not allow you to do this or displays an error, it means that the malicious code is actively resisting removal. In this case, you need to boot the phone into safe mode and repeat the procedure from there, or perform a full reset.
Administrator rights give the application full control over the device, so the presence of an unknown administrator is the most dangerous sign of system compromise.
⚠️ Attention: Some legitimate applications for parental control or finding a lost phone also ask for administrator rights. Make sure that you have installed such apps yourself before uninstalling them.
Monitoring network traffic and connections
Modern security tools allow you to analyze the network activity of your smartphone in real time. Spyware must constantly connect to the command and control server (C&C server) to send stolen data and receive new instructions. Identifying suspicious connections can help find the source of information leakage.
For in-depth analysis, you can use applications like NetGuard or built-in developer tools. Enable Developer Mode by tapping the build number seven times in the About Phone section, then enable USB Debugging. This will allow you to connect to a PC and use tools like Wireshark to intercept packets, although this method requires some technical knowledge.
An easier way is to check the data usage statistics in the settings. Sort apps by traffic consumption for the current month. If you see that a simple calculator or flashlight has sent several megabytes of data, this is a clear sign that malicious activity is hiding under its mask. Such applications must be removed immediately.
Radical measures: reset and protection
If software verification methods do not give a clear result, but suspicions remain, the most reliable way to get rid of wiretapping is to completely reset the device to factory settings (Hard Reset). This procedure completely clears the internal memory of the phone, removing all applications, including hidden viruses and Trojans.
Before performing the reset, be sure to back up your important contacts and photos, but do not restore the backup of your apps immediately after the reset, as you may get the virus back. It’s better to reinstall the applications from the official store Google Play. After the reset, immediately change all passwords for accounts that were logged into this device.
What to do after the reset?
After returning to factory settings, first of all, update the operating system to the latest version. Then install a reliable antivirus from a reputable vendor and only then start installing the necessary applications.
To prevent future attacks, it is recommended to practice good digital hygiene. Avoid installing apps from unknown sources, disable the ability to install APK files from your browser, and update your security regularly. It is also useful to periodically check the list of connected devices in your Google account.
⚠️ Attention: Menu interfaces and item names may differ depending on the version of Android and the manufacturer's shell (MIUI, OneUI, ColorOS). If you do not find the item you need, use the search inside the phone settings.
Frequently asked questions (FAQ)
Can the police or intelligence agencies wiretap a phone without installing apps?
Technically, this is possible through the equipment of cellular operators (SORM), but such wiretapping is carried out at the network level, not the network itself phone. It is almost impossible to detect it using software methods on the device, since malware is not installed on the phone.
Does airplane mode help protect against wiretapping?
Enabling airplane mode turns off all radio modules (GSM, Wi-Fi, Bluetooth), so data transmission to the external network stops. However, if you already have a spy voice recorder installed on your phone, it can continue recording and save it to the internal memory to send later.
How do I know if someone is reading my messages on WhatsApp or Telegram?
Check the "Active sessions" section in the messenger settings. If you see a device that does not belong to you, or a session from another city, immediately end it and change your account password. Also enable two-factor authentication.
Will an antivirus remove a spying app?
High-quality antiviruses (for example, Kaspersky, Dr.Web, ESET) are able to detect most known spyware applications. However, new or highly modified viruses can go undetected, so the antivirus does not give a 100% guarantee.
Is it possible to remove wiretapping without resetting the settings?
Yes, if you have definitely identified a malicious application by analyzing access rights or the list of administrators, it can be removed manually. However, if the virus has deeply penetrated the system, a full reset (Factory Reset) remains the only guaranteed solution.