Last week, the iOS 12 developer beta 7 was quickly released due to complaints about poor performance and instability issues. While Apple tackled these bugs two days later with the release of beta 8 from developers, testers see beta 7 again in the software update settings. Why is Beta 7 back and, more importantly, is it safe to download?
To answer these questions, it is important to learn a bit more about how Apple is testing the beta versions of iOS on devices like the iPhone: 19659003] Developer Betas vs. Public Betas
Apple offers two ways to Beta testing iOS – the developer beta and the public beta.
As the name implies, the developer beta is for registered iOS developers only and will come out first. The public beta, however, is open to all iPhone users who want to test upcoming software. Public testers get betas for developers, sometimes with different version numbers. However, both the developer beta and the public beta version are identical, so all testers use the same software.
It may sound confusing, but there are actually two Beta 7 versions different from the others. The "bad" Beta 7 was the one released on August 20th. This update was released only for developers and was later replaced by dev beta 8, which was identical to beta 7, except for stability issues.
If you see beta 7 in your software update settings, check out public beta 7. This beta is completely safe to download and has no relation to the broken developer beta 7. It is a mirror of developer beta 9, and it is a follow up to public beta 6, which was identical to dev beta 8 itself. Apple has never released a companion public beta version of dev beta 7, but will instead wait for a patch to be developed.
Long story short – public beta 7 will not introduce the problems that the original developer beta 7 did for testers.
Why betas are not as safe as you think
Other than that, there is no guarantee that installing the iOS 12 Beta is "safe". Betas are inherently working and have a long list of documented issues that users may experience.
While upgrading to Beta 7 is a breeze, if you're already using iOS 12, those who want to install Beta should now understand the risks before they do so
More information: Any reason why you should not install iOS 12 Beta on your iPhone