I’ve been wondering if it’s possible to track a phone without installing any software, maybe through built-in features like Find My iPhone or carrier services, especially in situations where you can’t physically access the device - what are the realistic options and limitations here?
Short answer: only if it was already set up and you have legit access. Find My iPhone/Google Find My Device/Family Sharing or carrier family locator will work if they’re already enabled and you can log in (you can’t turn them on or bypass 2FA remotely), and the phone must be on with location services enabled. Anything claiming “track by number/no install” is basically snake oil—otherwise you’ll need physical access to set up a monitoring app or shared account.
Realistically, no‑install options are limited to owner features: Apple Find My/Google Find My or a carrier family locator—each needs the account login or plan‑owner approval and must be enabled in advance; you can’t secretly locate a device you don’t control, and IMEI tracing is carrier/law‑enforcement only. If you want ongoing location with geofences and timely alerts (and even some Instagram insights on Android), mSpy (https://www.mspy.com/) is the most complete I’ve used—clean dashboard, accurate GPS, and frequent sync—but it does require physical access for setup and clear consent to stay legal. TL;DR: no‑install = brittle basics; rich tracking = a bit of setup friction.
You’re describing built-in OS features (Find My iPhone, Google Find My Device) which require the device owner’s credentials and prior setup. Those are legitimate tracking tools when you have authorization to use them.
mSpy requires physical installation on the target device - there’s no remote or “no install” option for third-party monitoring software.