Is your Android being tapped? 12 ways to check your phone for surveillance

The smartphone has become an integral part of life - we store photos, correspondence, bank data in it and even record voice notes. But what if someone is following you? Wiretapping and spying through Android devices is not a myth, but a real threat. Attackers can use special software, system vulnerabilities, or even legitimate tools (for example, parental controls) to access your data.

In this article we will look specific signs of surveillancefrom strange battery behavior to suspicious network activity. You will learn how to check your phone for wiretapping yourself - without complex technical skills, but using reliable methods. And also: what to do if surveillance is confirmed, and how to protect yourself from it in the future.

Important: some symptoms may indicate not espionage, but viruses, software failures or hardware problems. We will teach you to distinguish one from the other.

1. Unexpected decrease in battery life

If the battery begins to discharge 2-3 times faster for no apparent reason (you did not install new applications, did not update the system), this is an alarming signal. Spyware often runs in the background, consuming CPU and communications resources. It is especially suspicious if the phone heats up without load for example, lies on the table at night and is hot in the morning.

How to check:

• 📊 Open Settings → Battery → Battery usage. See which apps are consuming the most energy. Unknown names or system processes with high consumption (for example, com.android.system with 30% consumption) are a reason to be wary.
• 🔍 Enable developer mode (Settings → About phone → Build number — press 7 times) and check Settings → System → For developers → Processes. Look for suspicious background tasks.

Please note: some legal applications (for example, Google Play Services or Facebook) can also consume a lot of energy. But if in the top expense there was something like com.sec.android.app.launcher (although yours is not Samsung) - this is a clear sign of a problem.

⚠️ Attention: On Android 12+ some spyware disguises itself as system services. If you see a high-load process in the list of processes, it could be either a legitimate service or malware. Check with your antivirus. android.system.intelligence with a high load - it can be like a legitimate service Google, and malware. Check with your antivirus.

2. Increased mobile data or Wi-Fi traffic

Spyware transfers data to attacker servers: call recordings, screenshots, message logs. This requires an internet connection. If your traffic has increased by 2-5 times without objective reasons (for example, you haven’t downloaded movies or updated games), you should check your phone.

Instructions:

1. Go to Settings → Network and Internet → Data transfer → Mobile data usage.
2. See which applications consume the most traffic. Pay attention to unknown names or system processes with suspiciously high consumption (for example, com.android.providers.downloads with 5 GB per month).
3. Compare with previous periods. A sudden jump of 30–50% is a cause for concern.

Application/process	Normal consumption (per month)	Suspicious consumption
Google Play Services	200–500 MB	1 GB+
Android System	100–300 MB	500 MB+
com.sec.phone (on Samsung)	50–150 MB	300 MB+
Unknown names (for example, xn--d1acpjx3f.xn--p1ai)	0 MB	Any consumption

Critical sign of surveillance: traffic is consumed even when the phone is in airplane mode (if Wi-Fi is on). Spyware can ignore network settings.

3. Strange sounds during calls

Warding is often accompanied extraneous noise in the handset: clicks, echoes, noise or quiet squeaks. This may be a sign of:

• 🎤 wiretapping (for example, a device connected to the microphone input).
• 📡 Software interference (interception of audio stream through malware).
• 📡 Call forwarding to a third number (function *21#).

How to check:

Call another phone and listen to background noise|

Ask the other person to say if he hears an echo|

Dial *#21# —if a forwarding number appears, this is a sign of a leak|

Record the conversation on a voice recorder and listen for interference-->

If during a call you can hear regular. clicks (every 5-10 seconds), this may be a sign of activation of a listening device. In 2023, experts Kaspersky recorded an increase in attacks using similar methods on Android 10–13.

⚠️ Attention: Some telecom operators (for example, MTS or Beeline) can automatically activate forwarding services when connecting to certain tariffs. Before panic, check the conditions in your operator’s personal account.

4. Unauthorized activity: SMS, calls, geolocation

Spyware can send SMS to paid numbers, call unknown contacts or transmit your geolocation. data-i="116">📱 Numbers that you did not dial (especially short or international ones) appear in outgoing calls.

• 📱 Numbers that you did not dial (especially short or international ones) appear in outgoing calls.
• 📍 The battery drains faster when you are on the move - perhaps someone is tracking your location via GPS.
• 💬 In instant messengers (WhatsApp, Telegram) appear messages that you did not send.

How to check:

1. Open Settings → Applications → Permissions → Geodata. Look for apps with location access that should not use it (for example, a calculator or flashlight).
2. Check the call and SMS log for unknown numbers. Pay attention to short numbers (for example, +79xxxx123) - they are often used for fraud.
3. Install an application for monitoring network activity, for example NetGuard or GlassWireto track which apps communicate with external servers.

An example of suspicious activity: your phone sends an SMS to the number +79161234567 once a day at 3:00 a.m. This may be a sign Trojan softwarethat is disguised as system notifications.

5. Suspicious behavior of the camera and microphone

One of them. the most obvious signs of surveillance - independently turning on the camera or microphone. Modern spyware (for example, Pegasus or Cerberus) can activate them remotely without lighting the recording indicator.

How to detect:

• 📸 Shine a flashlight on the front camera in a dark room. If you notice a faint glow (even when the phone is turned off), this may be a sign of hardware wiretapping.
• 🎤 Use an electromagnetic wave detector (for example, RF Explorer) - it will show microphone activity even without visual signs.
• 📱 Check application permissions: go to Settings → Applications → Permissions → Camera/Microphone. Remove access from all suspicious apps.

A Android 12+ function has appeared - a green dot is displayed in the upper right corner of the screen if the camera or microphone is in use. If it lights up without your participation, this is a cause for concern. access indicator — a green dot is displayed in the upper right corner of the screen if the camera or microphone is in use. If it lights up without your intervention, this is a cause for concern.

⚠️ Attention: Some applications (for example, Google Assistant or Bixby) can activate the microphone for voice commands. Disable them in the settings if you do not use them.

6. Unknown applications and processes in the system

Spyware is often disguised as harmless apps: calculators, weather widgets, battery optimizers. But sometimes it can be calculated by name or behavior.

List of suspicious signs:

• 📦 In the list of installed applications (Settings → Applications) apps that you did not install appeared (for example, System Update, Android Services Library).
• 🔄 Processes with names like com.android.system.update, android.process.media or com.qualcomm.qti consume a lot of resources.
• 📁 Unknown files with extensions/storage/emulated/0/) unknown files with extensions appeared .apk, .dex or .so.

How to find hidden applications:

adb shell pm list packages -f | grep "suspicious_keyword"

Replace suspicious_keyword with part of the name of the suspicious process. For example, to search for spyware Cerberus use:

adb shell pm list packages | grep "cerber"

If you find something like com.lux.cerberus it is almost certainly malware. Remove it via adb uninstall com.lux.cerberus or reset the phone to factory settings.

7. Network activity analysis: who is connecting to your phone

Spyware exchanges data with attacker servers. You can track these connections using specialized tools.

Testing methods:

1. Via NetStat (requires root):

   adb shell su -c "netstat -tulnp"

   Look for suspicious IP addresses or ports (for example, connections to 185.143.223.43:4444).

2. Using Wireshark: Connect the phone to the PC, enable USB debugging mode and capture the traffic. Filter packets by protocol TCP/UDP.
3. Monitor applications: Fing, Network Connections or PcapDroid will show active connections in real time.

An example of suspicious activity: your phone sends data to an IP address every 5 minutes. Hong Kong or Panama, although you do not use any international services This could be a sign of botnet or spyware.

Connection type	Normal behavior	Suspicious behavior
IP addresses	Addresses Google, Yandex, your operator	Addresses in China, Russia, UAE for no reason
Ports	80 (HTTP), 443 (HTTPS), 53 (DNS)	4444, 5555, 7777 (often used by Trojans)
Protocols	TCP, UDP, QUIC	ICMP (may indicate network scanning)

How to find out who owns suspicious IP address?

Use services WHOIS (for example, whois.domaintools.com) or databases AbuseIPDBIf the IP belongs to the hosting in an offshore zone (for example, Choopa or HostSailor) and is not associated with legitimate services - this is a cause for concern.

8. Physical signs: overheating, strange messages, crashes

In addition to software symptoms, surveillance can also manifest itself at the physical level:

• 🔥 The phone overheats even in cold weather. standby mode (especially in the area of ​​the processor or communication module).
• 📵 Appear artifacts on the screen (stripes, flickering) during calls - this may be a sign of hardware interference.
• 💬 An SMS with a code is received activation of services that you have not used (for example, Your code for VKontakte: 12345).
• 🔄 The phone spontaneously reboots or turns off, especially when trying to make a call or connect to Wi-Fi.

If you notice at least 2-3 signs from this list, the likelihood of surveillance is especially dangerous. The combination of overheating + strange SMS + increased traffic.

What to do:

1. Disconnect the phone from the network (airplane mode).
2. Delete all suspicious applications.
3. Reset the settings to factory settings (Settings → System → Reset settings).
4. If symptoms persist, contact the service center to check for hardware bookmarks.

💡

Hardware bookmarks (for example, in the power module or SIM card) cannot be detected programmatically. If you suspect physical interference, it is better to buy a new phone and transfer data selectively.

FAQ: Frequently asked questions about Android wiretapping

Is it possible to wiretap a phone via Wi-Fi?

Yes, if an attacker connected to your network or exploited a vulnerability in the router, for example. attack MITM (Man-in-the-Middle) you can intercept unencrypted traffic (calls via VoIP, messages in older versions of messengers). Protection:

• Use VPN (for example, ProtonVPN).
• Disable WPS on the router.
• Update the router firmware.

How to check if my calls are being monitored through the operator?

Dial:

• *#21# —checking call forwarding.
• *#62# —checking forwarding when unavailable.
• *#002# —resetting all forwardings.

If a number appears after dialing, someone is forwarding your calls. Contact the operator to deactivate.

Can a virus listen to a phone through a speaker?

Yes, some Trojans (for example, Anubis or BankBot) can activate the speaker as a microphone, even when the phone is lying on the table. Signs:

• The phone is lightly. vibrates for no reason (the speaker is in microphone mode).
• In the permission settings, an unknown application has access to android.permission.RECORD_AUDIO.

Protection: disable access to the microphone for all applications except instant messengers and the camera.

How to protect yourself from wiretapping in the future?

Basic measures:

• 🔒 Install an antivirus with spyware protection (Bitdefender, Kaspersky).
• 📱 Check application permissions regularly.
• 🔄 Update Android to the latest version (in new versions have closed many vulnerabilities).
• 🚫 Do not install APK from unknown sources.
• 🛡️ Use GrapheneOS or CalyxOS —modified versions of Android with enhanced protection.

They can Is it possible to listen to the phone if it is turned off?

Technically, yes, but only in two cases:

1. Hardware bookmark (for example, in the power module or SIM card). Such devices can work even when the phone is turned off.
2. Fake shutdown. viruses simulate turning off the screen, mientras the phone remains active. Check: when the phone is “turned off”, call it from another number. If it rings, it’s a fake.

Protection: remove the battery (if possible) or store the phone in Faraday bag.