Apple has just released iOS 7 beta 4 to developers for download as predicted earlier today. No word on any of the changes yet, however it will most likely include bug fixes and a few UI changes here and there.
The firmware is currently available via Software Update and through the dev center shortly. The delta update is 263MB for the iPhone 5 and 207MB for older devices
Also, we will let you know if the update is safe for those without a registered developer account using the update trick soon.
Non-developers who have installed iOS 7 on their devices can safely update to iOS 7 beta 4 via Software Update, according to verified reports.
As we revealed last month, you can update to iOS 7 without a registered developer UDID as long as you perform the update procedure outlined here.
Remember you will not be able to restore your device to iOS 7; however, we have also verified that downgrading to iOS 6 is in fact possible.