Hold your phone flat and point the top edge toward magnetic North using a real compass. Keep it steady.
phone currently reads
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offset stored
0°
When the reading is stable and your phone top points North, tap Confirm.
Point the hour hand at the sun. Bisect the angle between the hour hand and 12 o'clock — that line points South. Then align the top edge of your phone with that direction and tap Confirm.
derived bearing of phone top
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Pick a visible landmark from the list below. Stand facing it directly. Align the top edge of your phone toward it and tap Confirm.