Apple has just released a new beta of iPhone OS 4.0, and it’s available at developer.apple.com.
You can leave this page open and keep refreshing, as we’ll be updating it with all the details about this release. If you spot something new or bugs, feel free to share in the comments below.

UPDATE: It seems like Apple has pulled beta 3.0. That’s odd, and we’ll keep you posted. Developers are reporting that Beta 3 was pulled due to problems with the SDK installer.
UPDATE #2: And it’s back.
The download comes as a 361MB .dmg file.
Screenshots and photos are back, you can feel safe to upgrade to this new beta.
The multitasking tray has got a new design, with the same texture which is used on the iPad:

This beta feels more stable and snappier than the previous one. Really, lots of fixes. (including character counts)
The tray now also features iPod controls and rotation lock button: (you have to swipe left, like with Spotlight)


And rotation lock icon in the statusbar: does this mean a landscape Springboard is indeed coming? Or maybe it’s just for apps?

The button to stop apps in the background now appears on every app:

Folders now have the same tray background, and if the apps inside a folder have badges the folder’s badge count will be a sum of the apps’ ones:


#1
That's what CBeloch said 4 months ago:
hope this fixes many things… beta 2 screwed nearly anything, was one of the worst betas in iPhone OS history I had installed over the last years
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#2
That's what Adam said 4 months ago:
Looks good!
Could anyone recommend tutorials on how to make iPhone apps?
Thanks!
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#4
That's what Maciek said 4 months ago:
Has anyone direct link to that software?
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#5
That's what Alex Knight said 4 months ago:
You need to pay the minimum ADC membership of $99/year in order to download iPhone OS betas.
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#6
That's what rfore said 4 months ago:
I like the new multitasking texture. The old one seemed very tacky. I also hope they changed the folder backgrounds as well.
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Nik Reply:
May 6th, 2010
@rfore, They did!
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#7
That's what Jonny said 4 months ago:
Dear lord a orientation lock! Was annoyed while reading in bed last night when Safari always rotates (the page was formatted for portrait viewing).
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#8
That's what Carlos Fonseca said 4 months ago:
ROTATION LOCK!!! FINALY!!!!!!!!! =DDD
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#12
That's what Sofia Fontes said 4 months ago:
Is it me or it only locks in portrait?
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#13
That's what ollie said 4 months ago:
Could you please post this nice background? This looks really great!
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hurle Reply:
May 4th, 2010
would like that too
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rfore Reply:
May 4th, 2010
@hurle, Here is a similar one.
http://dl.dropbox.com/u/1420144/Dark%20Theme.png
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hurle Reply:
May 5th, 2010
@rfore, thanks!
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#16
That's what nick said 4 months ago:
finally, i was getting sick of the crappy beta 2. now i can take pictures without having to mms them to myself! yay
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#17
That's what Arne said 4 months ago:
So what’s the real reason its been pulled now? Some say it’s the installer, some (ipodtouchfans) say its due to flash rom overheating. the installer wouldnt be a problem for me, as its already installed correctly, but i dont want to brick the device by overheating, lol
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rbukovansky Reply:
May 5th, 2010
@Arne, so far I can say, no overheating for me…
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Arne Reply:
May 5th, 2010
@rbukovansky, thanks for replying. Just found this mentioned in the forums: ipodtouchfans says "Seems all is not as bad as first thought, rumours were circulating that it was overheating, turns out it is a problem in the SDK. Sorry for the alarm guys."
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#19
That's what Justin Heintz said 4 months ago:
I found out that Apple removed the option to upload photos to MobileMe.
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#20
That's what gdfgfdfggdf said 4 months ago:
YES ROTATION LOCK!!!!
Finally they reversed that mistake of adding landscape mode to every app just because some misguided nerds demanded it. That dumb mistake made the thing useless to use when laying in bed.
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#23
That's what Rich said 4 months ago:
I’m liking the slight updates. They are correcting some of my little worries I had about OS 4.0. Eg. that strange exclamation mark!!
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#27
That's what Nik said 4 months ago:
It seems like they did remove the syncing screen. I’m currently syncing some music and I’m able to use my iPhone normally.
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