Apple has officially introduced the fourth beta version of iOS 7 to developers.

The new software went out to developers this week despite the original anticipated release date that was supposedly set for last week.

The release was delayed after Apple had to take its developer website offline after an "intruder" attempted to secure personal information "registered to developers" according to Apple.

The developer site has since returned and is open to those with developer accounts according to CNet.com.

The updated software includes "bug fixes" and a number of different improvements according to a blog post released by Apple.

If you have a developer account click here to download the new beta for he iPhone 5.

Apple claims to have corrected a number of issues including the "look and feel" of the lock screen, call functions, and camera.

Tweaks to the answer and call buttons have also been reported by 9to5Mac.com. Only those with an Apple developer account can access iOS 7 beta 4.

iOS 7 won't be released to the public until the fall, and will be included with either the iPhone 5S or iPhone 6 depending on which device Apple decides to release next.

The iOS 6 went through five different betas before it was officially released so one or two more betas could come before iOS 7 debuts to the public.

For those who can access iOS 7 beta 4, what do you think of it? What should Apple work on next time?

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