No, any iPhone 11, iPhone 11 Pro, or iPhone 11 Pro Max cases do not fit the iPhone 12 series.
Being able to reuse your old iPhone case on a newer model depends on a few different factors. Not only does your new device need to be the same size as your older model, but the cutouts need to match the camera, buttons, and ports.
Yes, all four iPhone 12 models support 5G connectivity.
Apple has launched four new iPhone models under the iPhone 12 lineup, including two standard models and two "pro" models. The lineup features various price points, screen sizes and camera options. The standard models include 5.4- and 6.1-inch display options. The Pro line will also include a 6.1-inch model in addition to a larger 6.7-inch model.