Hi, some weeks ago I noticed that my iPhone 6 was using the battery capacity in no time (from 100 to 1% in 4 hours) in addition to using all of my cellular data plan (10Gb). When i looked at the statistic page in settings it became clear that the background iCloud function for "Documents & Sync" was using all the cellular data. Before this happened, I installed the iOS 12 public beta on both the iPhone and iPad. Since the problems got really bad I rolled back to iOS 11 on all devices but the problem persisted. I deleted everything from the icloud storage I could on my Mac resp. online. After installing the xCode tools I was able to read the CPU utilization and down/up load speeds when the devices are signed into the icloud account: - two processes "securityd" and "cloudd" were using almost the entire cpu capacity without any sign of short term behavior - constant download from an icloud server to the device of approximately 30-60 MB a minute The only way to use my phone/pad again was to sign out of the icloud account on the devices. I tried to sign in into an old Me account to see if it is a device or server problem. With the old account signed it the phone behave completely normal. No sign of excessive CPU or data consumption. Apple Support said that I should just wait a few days, but no sign of improvement so far. Does somebody else have a similar problem? I assume it's a server or cloud SW issue, but maybe one of you have been in a similar situation and got it resolved either through actions on the device or on the backend. Please let me know and thanks for your help.