http://wccftech.com/how-to-download-ios-11-2-beta-without-a-developer-account/

We know you are looking to download iOS 11.2 Beta without a developer account. Here’s how you can do just that.

iOS 11.2 Beta 1 has been seeded to registered developers, and the final version of iOS 11.1 is not even out yet for the end user. There’s no doubt in the fact that Apple is rapidly working in the background to fix things up when it comes to iOS 11, and the testing just can not stop.