Why do I get a message that says ”An unexpected error has occurred.” when using my iPhone to look up a number, update the database, manually block a number or turn on the “Call Blocking & Ident...

If you restore the iPhone backup to a new device lately, the message ”An unexpected error has occurred.” might pop up when using Whoscall. That was because, during the backup process of the iPhone, the Whoscall functions were not well-saved, so when restoring the data to the new device, the error message might pop up.

Please avoid using iCloud to backup, but use a computer to back up through iTunes or use Quick Start to transfer data to avoid this problem.