By | Destiny Young
Mobile phones now hold almost everything about our lives. They contain private conversations, emails, banking apps, photos, work documents, location records, contacts, and social media accounts. Because of this, many people become worried when they suspect that someone may be spying on their phone.
The fear is not always wrong. Spyware and stalkerware exist. They can be installed on a phone to monitor calls, messages, location, browsing activity, photos, and app use. In some cases, the problem may not even be spyware. Someone may have access to the victim’s Google account, Apple ID, WhatsApp, email, or location-sharing settings.
If you suspect that your phone is being monitored, do not panic. Start by checking carefully, preserving evidence, and taking steps that protect your safety.
Signs That May Suggest Your Phone Is Being Monitored
A phone can behave strangely for many reasons. Poor battery health, old software, too many background apps, weak network signal, or faulty hardware can cause problems. Still, some warning signs should not be ignored.
Common signs include unusual battery drain, the phone heating up when not in use, sudden increase in mobile data usage, strange apps appearing on the device, microphone or camera indicators turning on unexpectedly, frequent freezing, sudden restarts, strange pop-ups, or the screen waking up without reason.
Another serious sign is when someone appears to know private information they should not know. For example, they may know where you went, who you spoke with, what you discussed in private messages, or plans you have not shared with them.
These signs do not prove that spyware is installed. They only mean that you should check further.
Start With Account Access
Many people focus only on the phone, but the real problem may be account access. If someone has access to your Google account, Apple ID, email, or WhatsApp, they may monitor your activity without installing spyware.
Start by checking the accounts linked to your phone.
For Google accounts, review the list of signed-in devices. Remove any device you do not recognise. Check account security alerts, recovery email, recovery phone number, and recent login activity.
For Apple ID, check the list of devices connected to your account. Remove unknown devices. Review trusted phone numbers and account recovery settings.
For WhatsApp, open Linked Devices and check whether your account is active on another phone, computer, or browser. Log out any device you do not recognise.
For email, check forwarding rules. Some attackers secretly forward copies of your emails to another address. Also check recovery details and login history.
For social media accounts, review login activity on Facebook, Instagram, X, TikTok, Snapchat, and LinkedIn. Log out unknown sessions and change passwords.
Use a safe device to make these changes if you strongly suspect that your phone is being monitored. A safe device may be another phone or computer you trust.
Check Installed Apps
Spyware may hide under ordinary-looking names. It may appear as a system utility, update tool, parental control app, security app, or device management app.
On Android, open Settings, then Apps. Review all installed apps. Look for apps you do not remember installing. Pay attention to names such as System Service, Update Manager, Device Health, Sync Service, Mobile Tracker, or anything that looks vague.
Then check app permissions. Pay close attention to apps that have access to location, camera, microphone, SMS, contacts, call logs, accessibility, notification access, and device administrator permissions.
Accessibility access is especially sensitive on Android. Some malicious apps use it to read screen content, capture messages, or control the device.
Also check Device Admin Apps. If an unknown app has device administrator access, it may be harder to remove.
On iPhone, go to Settings, then Privacy & Security. Review access to Location Services, Camera, Microphone, Contacts, Bluetooth, and Tracking. Remove permissions from apps that do not need them.
Also check Settings, General, VPN & Device Management. If you find an unknown profile, mobile device management setting, or VPN configuration, treat it seriously. Such profiles can control parts of the phone or route traffic through another service.
Check Location Sharing
Sometimes, the problem is not spyware. Location sharing may be turned on.
Check Google Maps location sharing. Review who can see your location and remove anyone you do not trust.
On iPhone, check Find My. Review people who can see your location. Also check Family Sharing if it is enabled.
Check WhatsApp live location, Snapchat Snap Map, Facebook location settings, and any family-safety or tracking app.
Some people forget that they once shared location with a partner, family member, colleague, or friend. That access may still be active.
Check Data Usage and Battery Usage
Spyware often works in the background. It may send information from the phone to another person or server. This can increase battery and data use.
On Android, go to Settings, Network or Connections, then Data Usage. Review which apps use the most data. Then check Settings, Battery, Battery Usage.
On iPhone, go to Settings, Mobile Data, and review app data usage. Then check Settings, Battery, and review battery activity by app.
Look for apps that consume high data or battery even though you hardly use them.
Again, this does not prove spying. Some normal apps run in the background. But unknown apps with high background activity deserve closer attention.
Run a Security Scan
On Android, open Google Play Store, tap your profile picture, select Play Protect, and run a scan. Also ensure that Play Protect is turned on.
You may also use a reputable mobile security app from a trusted company. Avoid downloading random “spyware detector” apps from unknown websites. Some fake security apps are themselves dangerous.
On iPhone, traditional antivirus scanning is limited because of how iOS works. Instead, focus on updating iOS, checking Apple ID access, reviewing device management profiles, checking app permissions, and using Safety Check if available.
Update the Phone
Outdated phones are easier to attack. Update the operating system and all apps.
On Android, go to Settings, System, Software Update.
On iPhone, go to Settings, General, Software Update.
Also update WhatsApp, banking apps, email apps, browsers, and social media apps.
If the phone no longer receives security updates, consider replacing it, especially if it is used for sensitive work, banking, or business communication.
Do Not Rush to Delete Everything
If you suspect spying, do not immediately delete suspicious apps or reset the phone. First, preserve evidence.
Take screenshots of unknown apps, strange permissions, linked devices, suspicious login activity, unknown profiles, threatening messages, and anything that shows private information was accessed.
Save these screenshots somewhere safe, preferably outside the suspected phone. You may need them if the matter becomes a legal, workplace, or safety issue.
This is important in cases involving stalking, domestic abuse, blackmail, workplace harassment, or threats.
Change Passwords From a Safe Device
If you believe the phone is compromised, do not use the same phone to change important passwords. Use a trusted device.
Change passwords for email, Google account, Apple ID, banking apps, social media, cloud storage, and messaging apps.
Use strong passwords. Do not reuse the same password across many accounts.
Turn on two-factor authentication. Where possible, use an authenticator app or security key instead of only SMS codes.
After changing passwords, log out all other sessions from each account.
Check SIM Card and Phone Number Risks
Sometimes, spying happens through the phone number rather than the phone itself.
Watch for signs such as sudden loss of network service, strange SIM replacement alerts, unexpected one-time password messages, or calls from people saying they received messages you did not send.
Contact your mobile network provider if you suspect SIM swap fraud. Ask them to place extra security on your line, such as a SIM replacement PIN or account password.
Check Cloud Backups and Shared Devices
A person may monitor your photos, messages, or documents through cloud access.
Check Google Photos, iCloud Photos, OneDrive, Dropbox, and Google Drive. Review sharing settings. Remove unknown shared folders or albums.
Also check whether your messages sync to a laptop, tablet, or browser you no longer control.
If you once used another person’s computer to access email, WhatsApp Web, Facebook, or cloud storage, log out from all devices.
When to Factory Reset
A factory reset can remove many forms of spyware, but it should not be the first step if evidence is needed.
Before resetting, back up important photos, contacts, and documents. Do not back up suspicious apps.
After the reset, reinstall apps manually from the official app store. Do not restore a full app backup if you suspect the backup may contain the same problem.
Change your passwords after the reset, preferably from a trusted device.
For serious cases, consider getting help from a cybersecurity professional before resetting the phone.
What to Do if the Spy May Be Someone Close
If the suspected person is a partner, former partner, family member, colleague, or someone with physical access to the phone, be careful.
Do not confront the person immediately if there is a risk of violence, threats, blackmail, or retaliation.
Use another trusted phone to seek help. Speak with someone you trust. Preserve evidence. Change passwords carefully. Consider reporting to the police or relevant authorities if there are threats, stalking, or abuse.
In high-risk cases, removing spyware may alert the person who installed it. Safety should come first.
How to Prevent Phone Spying
Use a strong screen lock.
Do not share your phone password.
Do not leave your phone unlocked around people you do not trust.
Do not install apps from unknown websites.
Keep your phone updated.
Review app permissions monthly.
Check WhatsApp linked devices regularly.
Use two-factor authentication.
Do not reuse passwords.
Check account login activity often.
Avoid connecting to unknown public Wi-Fi without protection.
Do not click suspicious links in SMS, WhatsApp, email, or social media messages.
A Simple Checklist
Check installed apps.
Review app permissions.
Check device admin access.
Check VPN and device management profiles.
Review Google or Apple account devices.
Check WhatsApp linked devices.
Check email forwarding rules.
Review social media login activity.
Check location sharing.
Run a security scan.
Update the phone.
Preserve evidence.
Change passwords from a trusted device.
Use two-factor authentication.
Get professional help if the case is serious.
Final Advice
Phone spying is possible, but not every strange phone behaviour means spyware. The best response is to investigate calmly.
Start with account access, linked devices, app permissions, location sharing, and login activity. Preserve evidence before deleting anything. Use a trusted device to change passwords. If there are threats, stalking, blackmail, or abuse, treat it as a safety issue, not only a technical problem.
A phone can be replaced. Accounts can be secured. Evidence can help. Personal safety should remain the first priority.
Destiny Young is an IT and cybersecurity professional, writes as part of his commitment to share knowledge and promote privacy.
