I see BuddyPing is using what I think of as “Dodgeball GPS”, where the user types in an address rather than relying on their phone being GPS-enabled. Despite all the hype we heard about E911 meaning every phone would have a GPS unit in it, the current state of affairs is depressing. It costs money to access the GPS in most phones, if you can get to it at all. TXTing an address or business name is still the most universal way of identifying your location, which is why ever-more companies are using the Dodgeball GPS hack in their products.