iPhone owners upgrading to the iPhone 7 may be wondering if their old case will work on the new device. While the iPhone 6 and iPhone 6s were basically interchangeable, design modifications to the iPhone 7 will affect how these older cases fit.
No, most iPhone 6s cases will not fit the iPhone 7. The same goes for iPhone 6s Plus cases, which will not fit on the iPhone 7 Plus.
The iPhone 7 features a larger camera and flash than previous models. Most iPhone 6 and 6s case designs will not accommodate the bigger camera size in their rear cutouts. While there are some older cases that fit the camera of the iPhone 7, the iPhone 7 Plus features a dual camera with a completely different shape than the iPhone 6s Plus.Besides the camera changes, the iPhone 7 and 7 Plus do not have a headphone jack. Older cases will not reflect this fact, and may cover up the barometric valve that was added as part of the iPhone 7 waterproofing. Although the iPhone 6s and iPhone 7 share the same external dimensions, other design changes make most older cases obsolete.