If your phone's battery life suddenly decreases significantly without a clear reason (e.g., new apps or increased usage), it could be a sign of malicious activity.
Unexpected sluggishness or slow performance could indicate that unauthorized processes are running in the background.
Check your installed apps regularly. If you notice unfamiliar or suspicious apps that you didn't install, it's a red flag.
Unexplained data usage could suggest that your phone is transmitting information to a third party without your knowledge.
Pop-ups or ads appearing more frequently than usual, especially when you're not using a particular app, may be a sign of malware.
If you receive strange texts or calls from unknown numbers or contacts, your phone may be compromised.
Excessive heat when your phone is not in heavy use might indicate background processes, possibly malicious ones.
Unexplained network activity could suggest that your phone is involved in unauthorized communication.
If your phone settings, such as Wi-Fi, Bluetooth, or security settings, change without your intervention, it could be a sign of a security breach.
Check your phone bill regularly for any unusual charges. Unauthorized access might lead to premium-rate calls or services.