It order to get the first initial GPS fix, your Explore Smart Collar will need a clear line of sight to the sky. This can be done by taking your collar outside or setting it by a window for about 5-10 minutes.
Note: Some obstructions such as trees and taller buildings can interfere with getting a GPS fix.
You will know if you have GPS if the indicator is filled. If the indicator is empty, you do not yet have a GPS fix.