If you're on Android there's an app, GPS Test that shows you a chart with all the signals it's picking up with different symbols for each system and a filter to

If you're on Android there's an app, GPS Test that shows you a chart with all the signals it's picking up with different symbols for each system and a filter too. My phone is currently picking up 5 GPS, 4 GLONASS, 8 Galileo, and even 3 Beidou sat signals (I'm in Western Europe). Also you should be able to look up your phone specifications to see what GNSS services it's capable of using on GSMArena Edit:oh I missed that you're on Apple so that app is useless for you. Still might be of some use to others though.