Can someone spy on your phone without having your phone?

Can someone spy on your phone without having your phone? Yes, someone can spy on phone without physically having phone through malware, spyware apps, phishing links, and compromised cloud accounts, though it requires some form of access or trick. Methods include spyware like Pegasus that exploits vulnerabilities, stalkerware installed by someone who briefly had phone, phishing messages that trick you into installing malicious profile, or accessing your iCloud or Google account if they have password, allowing them to see photos, location, and backups. Also, insecure WiFi, malicious apps with excessive permissions, and SIM swapping can expose data. Signs of spying include battery draining fast, overheating, unusual data usage, and strange messages. To protect, keep phone OS updated, use strong passcode and two factor authentication, avoid clicking unknown links, review app permissions, install apps only from official stores, and use security scan. Legally, spying without consent is illegal in most countries. If you suspect spying, reset phone, change passwords, and check account login history. So spying without physical phone is possible but requires exploiting software or credentials.