يَوْمَ يَسْمَعُونَ ٱلصَّيْحَةَ بِٱلْحَقِّ ۚ ذَٰلِكَ يَوْمُ ٱلْخُرُوجِ ٤٢
The Day they will hear the blast [of the Horn] in truth. That is the Day of Emergence [from the graves].
Your location stays on this device and is only sent, rounded to about 1 km, to fetch the times.