Thanks for your input! I tried manual backup several times, it does not move my contacts up to iCloud. Seems that these contacts are somehow not readable. And all groups / accounts are checked. And default is iCloud. Problem remains, cannot move contacts from phone to cloud
Root problem: most contacts on iPhone 6+ will not sync to iCloud. A few contacts sync without a problem. Newly entered contacts will not sync.
Failed solutions: I have read and tried a number of solutions that are performed in Settings, as found on the Web.
The good contacts: I can make a...