For a lost Samsung, start with the free, built‑in stuff before even thinking about third‑party apps.
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Samsung’s Find My Mobile (best first choice)
- Works via your Samsung account.
- Can ring, lock, wipe, and track location.
- Some models support “Send last location” and remote controls even if mobile data is off (as long as it connects to a network again).
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Google’s Find My Device
- Uses your Google account.
- Simple, reliable, works on any Android.
- Shows last known location; needs the phone to come online again to update.
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Offline options
- Nothing can live‑track a phone that’s fully powered off.
- You only get: last known GPS/Wi‑Fi location + any “send last location” features when battery is low.
Third‑party apps (like Spynger) are overkill for a one‑time loss and usually require prior installation and permissions. I’d stick to Samsung + Google first.