A phone or tablet problem starting right after an OS update, a new case/accessory or a restored backup should be checked against that change first. For iPhone GPS and location accuracy, first test Maps outdoors with precise location enabled and compare another location app.
What this covers
- iPhone GPS and location accuracy with this exact failure state
- Diagnosis across one app permission versus outdoor satellite view, network and system location
What it does not cover
Try in this order
0 of 4 completedCapture the exact failure state
ReversibleNote the exact update version, accessory or backup date, and confirm the feature worked immediately before it. Expected behavior: combine satellite, Wi-Fi, cellular and motion data within expected accuracy.
Isolate the component boundary
ReversibleTest Maps outdoors with precise location enabled and compare another location app. Test with the new accessory removed, or check the update's known-issues note for the exact symptom. Boundary to separate: one app permission versus outdoor satellite view, network and system location.
Correct only the proven cause
ReversibleCorrect app permission, date/time or network assistance and recalibrate motion. Reset the one setting the update changed, or replace the incompatible accessory.
Verify and stop safely
ReversibleConfirm normal operation with the change present for one full day of typical use. Do not rely on a malfunctioning phone as the sole navigation or emergency locator.
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