This method is only for registered app developers. If you are an ordinary user, please install this app to register your UDID under the developer before installing iOS 12 beta.


iOS 12 beta is available for who registered under Apple Developer Program membership as a developer. You need to pay USD 99 annually to register as Apple developer. Use the following guide.


Step 01 - Download the configuration profile from the official Apple Developer download page.


(You can directly download configuration profile on your iOS device. If not, you can download it to your Mac or Windows PC and email to the account on your iPhone and access the link through your iOS device.)


Step 02 - Plug your device into power sources and connect to the Internet with Wi-Fi.


Step 03 - Tap Settings > General > Software Update.


Step 04 - Tap Download and Install.