You might not want to use your iPhone 5s to find your way out of the woods just yet.
A number of users are reporting that their iPhone 5s compass and level are showing incorrect values when placed on flat surfaces. It might be a hardware issue, leaving Apple with a costly hardware recall or replacement issue. The problem could also point to a software snafu that needs speedy patching.
The problem was first spotted on by “tharepairguy” on a forum thread over at Mac Rumors. He set his iPhone 5s and his iPhone 4 to magnetic north. The iPhone 4 reads 179 south, while the iPhone 5s reads 165 south. His car compass confirms the iPhone 4 reading.
He then checked the level app on each phone. The iPhone 4 showed a surface to be level, as did two other Johnson analog levels. The iPhone 5s? -4 degrees.