This concept is an old one
1) History. The ability to buy location information from carriers has been around for many years. At least as long as E911 locating. Before built-in GPS, it was seen as the only way to have helpful locating apps.
2) Privacy. Since your location isn't given unless you allowed it to be, there's no privacy invasion... in theory. In practice, I'd be wary of accepting a phone from an ex-husband without first checking with the carrier.
3) Useful. It makes a great method for general locating without using extra battery. The downside in this case is the almost useless one or two hour granularity in data.
1) History. The ability to buy location information from carriers has been around for many years. At least as long as E911 locating. Before built-in GPS, it was seen as the only way to have helpful locating apps.
2) Privacy. Since your location isn't given unless you allowed it to be, there's no privacy invasion... in theory. In practice, I'd be wary of accepting a phone from an ex-husband without first checking with the carrier.
3) Useful. It makes a great method for general locating without using extra battery. The downside in this case is the almost useless one or two hour granularity in data.