Android API provides this: https://developer.android.com/reference/android/location/GnssStatus.Callback.html https://developer.android.com/reference/android/lo

Android API provides this: https://developer.android.com/reference/android/location/GnssStatus.Callback.html https://developer.android.com/reference/android/location/Gns... https://developer.android.com/reference/android/location/GnssStatus.html https://developer.android.com/reference/android/location/Gns... You can also use apps like GPS Test [0], etc. They can tell it as well. QZSS is represented by square icon(s) in that app. [0]: https://play.google.com/store/apps/details?id=com.chartcross.gpstest&hl=en https://play.google.com/store/apps/details?id=com.chartcross... (not affiliated with them in any way)