An iPhone 5 and iPhone 5S side by side showcasing the differing compass readouts. It's unclear whether the issue is on the hardware or software side.
(Credit: Josh Lowensohn/CNET)
Apple Maps may sometimes send clueless drivers off the beaten path and even onto active airstrips, but the company may be facing a far deeper problem with its new flagship iPhone 5S' directional capabilities. Widespread reports are claiming that the new device's motion sensors are highly error-prone, and the problem could be on the software side or a calibration error built into the handset itself.