Test your Android device's satellite navigation performance
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GPS.gov: GPS Accuracy
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GPS will be accurate within one foot in some phones next year - The Verge
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GPS.gov: GPS Accuracy
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How to achieve 1-meter accuracy in Android
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It's here: An affordable rugged smartphone and sub-meter GPS solution | Get Rugged
A Complete Checklist to Set Android GPS Location to High Accuracy
“Lost in Tracking” or why mobile GPS is inaccurate?
