To check if your iPhone has been hacked, look for changes in your phone’s security features, such as alterations to Find My iPhone or passcode settings. Check the Settings > Privacy & Security > Safety Check for any unusual activity. Monitor your phone for unexpected behavior like sudden battery drain, unusual app installations, or unfamiliar login locations. Also, review your iCloud and Apple ID accounts for any unauthorized access or changes. Additionally, be cautious of phishing emails and suspicious files, as clicking on them can lead to hacking.