According to a posting on the Apple Developer boards this afternoon, Apple will be resetting iCloud Backup data on Thursday, September 22nd. We believe Apple is performing this reset for the release of iOS 5 GM, which will be released around the same time of the reset. iOS 5 GM will be the last release before iOS 5′s official debut in early October, like we previously reported. This reset doesn’t include data from mail, contacts, calendars, reminders, or bookmarks.
On Thursday, September 22, the iCloud Backup data will be reset. Backing up to iCloud or restoring from an iCloud backup will be unavailable from 9 AM PDT – 5 PM PDT. If you attempt a backup or restore during this time, you will receive an alert that the backup or restore was not successful. After this reset, you will be unable to restore from any backup created prior to September 22. A full backup will happen automatically the next time your device backs up to iCloud.
Along with iOS 5, we are hearing two new iPhones will be accompanying it, and will be announced in late September and available for purchase October 7th-ish. Check out last week’s post for all the details.