If you like living on the edge, Apple as released a whole raft of new betas for you to play with, ahead of their official unveiling, which is expected over the next few weeks. First off, there's a new iOS 12 beta, with developers getting beta 11 and public beta testers getting their hands on public beta 9. On first blush these appear to be the same code. Both also seem to consist of fixes and performance updates, rather than any new features.
Also: Here's what readers want -- and don't want -- from the next iPhone[1]
This update comes hot on the heels of an iOS 12 beta that was released last week[2], and could very well be the last release we see from Apple ahead of its anticipated iPhone event, currently rumored to take place on September 12[3].
If you want access to the public beta, you need to sign up for it. You can do that here[4]. It involves downloading a profile to your iOS device (when Apple releases the final version of iOS 12 later this year, your iPhone, iPad, or iPod touch should automatically update to the final version of iOS 12, and you'll then be able to delete the configuration profile from Settings > General > Profile).
Before you go any further, you might want to look at my list of precautions and caveats[5] related to running beta software on your iPhone (things can go from smooth to ugly in a heartbeat). At the very least I suggest you have a full backup of your device done (I recommend you make an encrypted local backup using iTunes).
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