Interesting test on my phone: - Start any offline map service with indication of location accuracy or an app like GPS Test - Put phone in Airplane mode (no Wifi or cellular network): Reasonably accurate location (8-12 m) for an indoor location. Satellite strength is not impressive compared to other devices, but reasonable. - Turn on Wifi: Satellite signal strength gets worse. Location accuracy gets slightly worse. - Turn off Airplaine mode: Satellite signal strengt drops further. Location accuracy gets worse. - Turn Airplane mode back on: Satellite signal strength improves and location accuracy re-established. My thoughts are that the device either has some interference between the receiver circuits of the gps-system and the cellular network, or that the software that combines GPS-info with the Google location service is faulty. Sadly, airplane mode is not very helpful when playing location-based games.
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I got my XZ1 Compact one week ago and I have also noticed a few times where location-enables apps suddenly stops receiving new positions. Today it happened again and I used a GPS-test app (GPS Test by Chartcross Limited) to see what the problem might be. I discovered that the location system had lost track of all the GPS-satellites. The funny thing was that it still could track Glonass and even Beidou satellites, but apparently with less good location accuracy. I force-closed all apps and the phone then seemed to be able to re-establish contact with all satellite systems. So something seems to be buggy with the satnav-system in the phone. Hopefully it can be fixed in a software update. I am currently on the 47.1.A.2.374 firmware.
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