Not universal, different sizes, incompatible phone cases. The Phone12 has a face-facing border design, which comes in five colors: black, white, red, green and blue.
The iPhone12 uses a straight bezel design, the height is 146.7 mm, the width is 71.5 mm, the thickness is 7.4 mm, the iPhone11 width is 75.7 mm, the height is 150.9 mm, the thickness is 8.3 mm, the size of the phone case is not the same, it is not common.
Apple mobile phone cover also has the effect of enhancing the signal, because some mobile phone shell and metal contact to form a magnetic field to interfere with the mobile phone signal, put on the mobile phone insulated mobile phone cover, you can enhance the signal.
The iPhone 11 and iPhone 12 cases are not universal, because the iPhone 11 is slightly smaller than the iPhone 12, and the thickness is not the same.