أَفَحَسِبْتُمْ أَنَّمَا خَلَقْنَـٰكُمْ عَبَثًا وَأَنَّكُمْ إِلَيْنَا لَا تُرْجَعُونَ ١١٥
Then did you think that We created you uselessly and that to Us you would not be returned?"
Your location stays on this device and is only sent, rounded to about 1 km, to fetch the times.