October 9, 2018: apple releases ios 12.1 beta 3 to developers. apple has just released the third beta version of ios 12.1 for developers. if you have a previous ios 12 beta installed, you can head to settings > general > software updates and get started downloading.. How to download ios 9.3 beta note* this method can be used to install any ios beta software version!!! to register your ios device udid and download ios 9 betas click this link below: have fun guy. How to install ios 12.1 using itunes on your mac or windows pc; how to install ios 12.1 over the developer or public beta; what's new in ios 12.1 october 30, 2018: apple releases ios 12.1 with group facetime calls and more. ios 12.1 has arrived, complete with support for group facetime calls, new emoji dual-sim, and more..