
Apple had seeded developers of its iPhone Developer Program with the fourth beta version of iPhone OS 4.0 but seems to have pulled it after two hours.
Apple has released a new beta version of iPhone OS 4 every two weeks (Beta 1, Beta 2, Beta 3) since it gave a preview of the next generation iPhone OS at a special event in early April.
iPhone OS 4.0 includes 100 new features for iPhone users such as multitasking, folders etc and more than 1500 new APIs for app developers.
It looks like Apple has made several changes to networking behavior for suspended apps for the multitasking feature, which is relevant to the developer of the iPhone app based on initial reports from developers who were able to download the latest beta version of iPhone OS 4.0 SDK.
As you would expect, the new beta version of the iPhone app includes many bug fixes.
We will let you know if the latest beta version of iPhone OS 4 beta 4 2 and SDK reveals any interesting new features.
Apple might announce the release date of iPhone OS 4.0 during WWDC 2010 Keynote address.
Update 1:
MacStories is reporting that iPhone OS 4.0 Beta 4 includes the following changes:
- It has a default Utilities folder to reduce the clutter on the iPhone home screen. As you can see in the screenshot the Utilities folder includes iPhone apps such as Calculator, Clock, Digital Compass and Voice memos.
- It includes some new wallpapers.
- The GPS button in Maps now uses the same icon that will be used to indicate apps that use location in the status bar (Reader Bert has commented that this change was observed in previous beta versions as well, thanks Bert).



- There is an option to toggle off the ability to send group messages

Update 3:
Gizmodo has discovered a new option in the setting menu to enable Internet tethering. So looks like despite reports that it might not be available soon, AT&T customers will finally get the iPhone tethering feature with the release of iPhone OS 4.0, which was introduced by Apple in iPhone OS 3.0.

[via MacStories, Gizmodo]
iphone OS beta 2 is not the latest version. beta 3 is, at least till 4 gets re-released
Corrected it, thanks for highlighting the error.
Can it be jailbroken with Spirit? (In an MC 3GS Model)
no
Didn't apple pull the third beta too after 2 hours?
Seems like they only want less people having the 4.0 beta…
That's not the case. It was pulled but it was available again after sometime.
I like how the author is communicating with us in our discussions. He should have done that in the Steve Jobs letter! That would have been interesting (though it already was!)
the GPS icon in maps is in the previous betas as well, no change there.
Thanks Bert for your inputs, updated the post.
compas in maps is a lot more accurate than it was in beta 3!!!
When is the unlock gonna release….. So long wait this time …..
Keep waiting stop moaning
I surely hope that the next iPhone will bring in a Radio feature!
http://news.cnet.com/8301-13579_3-10374854-37.html
http://9to5mac.com/iPhone-fm-app
http://www.apple.com/ipodnano/features/fm-radio.html
i hate the tethering shit dont no why people would want them to have that wen you get it free now it makes no sense to me
When will iPhone work on Video calling on 3G mobile Network ….???? Anyone got idea plz need help???
Aviator
I have the tethering hack right now on my 3.0. If I back up my phone and update and jailbreak to 4.0, and then restore to backup, will I still have my tethering hack? (I restored my 3.0 without updating before and the hack was still there).
So what I'm really asking is, is there a way to update to 4.0, and still have my tethering for free??
Thanks!!