If you aren't using gps on sprint then it won't update. Sprint doesn't allow google to use the tower location to update where you are only with an active gps lock. So if you turn off gps, no more updates. Also if you exit the program and still let it update it uses the towers, which sprint doesn't allow so again no updates. If someone with a FUZE wants to chime in and let us know if they get tower location tracking that would be great
anything nongps doesn't work on sprint.