How to download and install the iOS 15 public beta

beta profile ios 15iOS 15.8.x is only available for iPhone 7, iPhone 7 Plus, iPhone SE (1st generation), iPhone 6s6s Plus and iPod touch (7th generation).iPhone models with a USB-C port include all iPhone 15 models and newer. ... introduced in version 2.7 of the specification. iOS 18 supports RCS Universal Profile 2.4.