Petfon has a feature of "WiFi assisted location". In areas with high wifi density, it would help us improve location speed. After opening the WiFi assisted location, our device could automatically access the WiFi locations in the surrounding areas, and use them as reference to position itself. If you are living in a crowded city/district,it would help us a lot in improving the positioning speed. You don't need to login or access any of these WiFi, the system would use them as location reference automatically.
HOWEVER, if you are living in rurual area with not so many WiFi spots around, it's better to turn off this feature. Since WiFi assisted locating might give you wrong positioning reference if there are not enough WiFi spots around.