Newer iPhones Reportedly Swell Mid-Flight, Then Return to Normal After Landing

Overview

• User posts on Reddit detail iPhone 16 Pro Max and iPhone 15 units with back panels lifting while airborne.
• Some devices appeared normal after landing, and one iPhone 15 stopped exhibiting the issue after a battery replacement by Apple.
• Commenters suggest trapped gas in lithium-ion cells expands as cabin pressure drops, causing temporary bulging.
• The Mac Observer advises alerting flight crews, photographing the device if safe, stopping use after landing, and booking service.
• The incidents appear rare, there is no public recall or broad acknowledgement from Apple as of Jan. 3, and users say photos helped overcome initial dismissals.