So, unlike GPS trackers or competing Bluetooth trackers, AirTags can do two things:
* Last for a very long time on a small battery, no recharging required.
* Reliably report location anywhere in the world that an ordinary person is likely to be.
What happens inside buildings when the phone doesn't have a fix? Does it store the tag's key and sends it as soon as it gets gps data?
Your phone takes it's last position from GPS, refines it with RSSI of nearby WiFi networks and then you add in the broadband stuff they have to localize the tag further.
Yes of course. That's how these phones are supposed to work. I don't have time to micromanage my devices. As long as I get a day of usage, why would I bother?
Absolutely, yes.
> What happens inside buildings when the phone doesn't have a fix?
Have you never used your phone inside a building before? It still has a very good idea of your location, it doesn't rely solely on GPS signals.