According to the U.S. Stock Research Agency, Sina Technology learned that Apple's iCloud service has reportedly suffered a wide range of downtime. Based on the voluminous reports MacRumors has received and hundreds of complaints on Twitter, some of Apple's iCloud services appear to be malfunctioning. According to the Apple system status page, there are problems with iCloud Backup, iCloud mail, and photos. It's unclear if all users were affected.