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When will Public Beta 2 be released? I thought they're released on a weekly basis.

Betas tend to be fortnightly at this early stage and then move to a weekly schedule nearer release.

Ordinarily I'd expect developer beta 3 in the next 48 hours, and then usually the public beta will be a day or 2 after that, but with the July 4th holiday on Thursday we may be waiting a week longer for them.
 
When will Public Beta 2 be released? I thought they're released on a weekly basis.

Two weeks isn't uncommon. Here's a graph: https://willhains.com/iOS-version-history

Check particularly the major releases: 12.0b3 came after 29 days, 11.0b3 after 35 days, 10.0b3 after 35 days, 9.0b3 after 30, …

It's been 29 days, so the third developer beta will probably come this week or the next. Then based on that:

1) the second public beta will either be an identical build, following a few days after the developer beta (having verified that there are no showstoppers), or
2) the second public beta will be a slightly later build with a few showstoppers fixed, or
3) they have so many showstoppers that they'll skip the cycle altogether and wait for the fourth developer beta to form the new basis for the second public beta
 
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