Both the iPhone 12 and the mini version feature a new design with aluminum edges, as opposed to the stainless steel edges used on the two Pro models. Now there is debate about whether the aluminum edges have a fading defect.
According to a new report, the two cheaper iPhone 12 models are said to have a fading defect on the aluminum edges. The Slovakian Apple blog Svetapple explains that they bought a (PRODUCT)RED iPhone 12 model in November and have been using it in a case since then. However, over the last four months, the red aluminum has faded noticeably in certain places on the edges. In the report is it [called:
We purchased a red iPhone 12 for the editorial team in November 2020, which is used mainly for work purposes. This phone has been carried in a transparent case since day one and has not been used in a "toxic" environment with aggressive substances.

iPhone 12: How widespread is the problem?
The fading is most noticeable in one corner, near the camera panel. Interestingly, this issue doesn't seem to be unique to the current model. Previous iPhone models, including the iPhone 11 and iPhone SE 2, also use aluminum edges and have suffered from similar fading issues. Apple simply touts that the new device uses "aerospace-grade aluminum edges."
There are several posts on the Apple forum highlighting the same issue. Although none of them apply to the iPhone 12, the issues occurred for users with the iPhone 11 or the second-generation iPhone SE. They also did not necessarily have to use the PRODUCT (RED) variant; the fading also occurred in green or black.
What is particularly interesting here is that it occurred within a short period of time on the iPhone 12. Apart from that, it is unclear how widespread this problem currently is. After all, the model purchased by Svetapple could just be suffering from a manufacturing defect. (Image: Apple)