Sudden and excessive battery drain can be a sign of some suspicious activity running in the background.
If you notice a significant increase in data usage without any changes in your usage patterns, it could indicate unauthorized background processes.
Unexplained calls, texts, or messages you didn't send could be a sign that someone else has control over your device.
A sudden slowdown in the phone's performance could be due to unwanted apps or malware running in the background.
New apps appearing on your phone that you didn't download, or install is a red flag for potential hacking.
Unusual overheating might be caused by malware or other malicious software.
If you notice any signs of your phone acting on its own, such as opening apps, moving the cursor, or controlling settings without your input, it might be under remote control.
Unauthorized changes in settings, such as unfamiliar configurations or security settings being altered, could indicate a hack.