Unfortunately, Apple has made some minor changes to the iPhone 13 design that mean most of your iPhone 12 cases won’t fit…
ShiftCam cases give iPhone 11 models up to four extra lenses- 9to5Mac, shiftcam
iPhone 13 Pro vs 15 Pro: Enough changes to upgrade? - 9to5Mac
PSA: iPhone 13 Pro might be nearly incompatible with the MagSafe Duo - 9to5Mac
Will the iPhone 12 Pro Max case fit the 13 Pro Max?
iPhone 15 Pro Color Options Allegedly Will Offer Titan Gray And Blue
Can the iPhone 13 Pro Max fit the case of an iPhone 12 Pro Max? – Pickr
iPhone Case Compatibility - A Guide to Finding the Right Fit
Will the iPhone 12 Pro Max case fit the 13 Pro Max?
Best iPhone 13 cases now available for purchase - 9to5Mac
Can an iPhone 12 case fit the iPhone 13? – Pickr
Will the iPhone 12 Pro Max case fit the 13 Pro Max?