Apple has built a magnetic ring for the iPhone 12 series smartphone that can be perfectly attached to MagSafe accessories, so that users can easily attach accessories such as chargers and wallets. Gustavo Fontana recently answered another netizen’s question on Twitter and attached a PDF link to “Apple device accessories design guide.”. < / P > < p > the document details the type and orientation of magnets that can be used, as well as other design details specified by apple, covering specific locations, sizes, and polarity instructions. < / P > < p > for example, the thickness of the MagSafe protective shell should not exceed 2.1 mm, otherwise the accessories are likely to be difficult to connect firmly by magnetic suction. In addition, all MagSafe accessories can achieve magnetic alignment within a maximum radius of 1.55 mm. < / P > < p > at the same time, apple doesn’t want the protective case with magnets to affect wireless charging or original wallet accessories, and it provides a special test protocol for manufacturers. Global Tech