Apple has now released beta 8 for developers, replacing the withdrawn beta 7, which suffered from performance problems. Hopefully, Apple has solved the problems now, but we recommend to be careful.
iOS 12 Beta 8 is now available for download either as an OTA update or as a .ipsw file on Apple’s iOS Developer Center pages. We do not expect substantial changes from the already modest ones that we have seen in previous beta 6 and beta 7, but all the reliability and stability problems found in the previous system version should have been corrected.
If there are any news of importance we will update you with a new dedicated article.