Is having a location-aware pass the same as leaving the maps application open 24/7...? The solid location services icon seems to indicate that. After trying to figure this out in other threads, I think we need a thread where someone can clarify how the location-based feature of passbook - where your starbucks card shows on the lock screen when you're near a starbucks, etc. - works. Apple lists two kinds of location services: geofencing, shown as an outline of the location services icon, and regular, shown as a solid icon. Passbook does not seem to use geofencing - under the privacy/location services menu, apps like Reminders have the outline icon (geofence) but passbook definitely has a solid icon. I'm not sure about anyone else, but when I have a pass in passbook using location services (starbucks, in my case), whenever I wake the phone up from standby, there is a solid location services icon at the top. It stays there for ~10 seconds, then goes away. I checked the list of apps that use location services, and the only one with a purple arrow (meaning used found location services) was passbook, so I know that the icon I see when I wake up my phone is due to passbook. My question is this: do you think that location services is ALWAYS on while the phone is locked? Won't that be terrible for battery life? I suppose it's possible that it only checks your location when you wake from standby, but then you'd have to wait a minute after you take out your phone for the pass to show up. Are there different resolutions of location awareness that are all represented by a solid location services icon? Because maybe passbook uses a less accurate (and less power-hungry) service just to tell if you are within, say, a block or two of a starbucks. Does anyone know how this works?