So I just went back to iOS 11.4. Here's why: 1. Calls on other devices isn't working on iOS 12 Developer Beta 1 yet. 2. EverNote is not working well. 3. Skype doesn't work at all. There were not many/any issues apart from the above except maybe worse battery life. Anyway, after using my X on iOS 12 Beta 1, iOS 11.4 is nowhere near as snappy or quick. It is like my X is rather slow compared to iOS 12 which was lightning quick. It is like going back to iPhone 7 on 10.3.3 or something. My iPad Pro 10.5s are okay on iOS 11.4, but nowhere near the speed and agility I was getting on iOS 12.