Can I track a cell phone location without them knowing?

Related questions

1. Can your location be tracked when your phone is off?
2. What is Google Location History?
3. Does iPhone track your location?
4. Can you still be tracked if your location services are off?
5. Can I track my location history on iPhone?
6. Can someone trace my location?
7. How can I track someones phone calls?
8. Can someone see when you check their location on iPhone?
9. How does Google track your location?

Tags

1. #number
2. #internet
3. #mobile
4. #track
5. #phone
6. #great
7. #locate
8. #coordinates
9. #phones
10. #results
11. #seconds
12. #trackers
13. #location
14. #within
15. #tracking
16. #connected