https://wccftech.com/iphone-12-camera-repairs-require-proprietary-tool/

Previously, when the iPhone 12 and iPhone 12 Pro received the teardown treatment from iFixit, one massive detail didn’t come into the light, until now. It appears that Apple is locking down iPhone repairs one step at a time, starting with the camera. This time, if you’ve made up your mind to get some iPhone 12 camera repairs done, luck won’t be on your side, not unless you have access to Apple’s proprietary, cloud-linked System Configuration app. Here are more details on how this works.

Thanks to some comprehensive testing, not to mention reviewing leaked Apple training documents, iFixit’s teardown team has found out that the iPhone 12 camera becomes extremely unreliable when it’s switched between two models. In the video clip given below, the camera does appear to work on launch, but upon switching to the ultrawide-angle mode, it stops responding, only gives feedback on certain modes, and sometimes doesn’t respond at all.