A systematic and format conservation approach is required to
merge vCard files without losing data. Duplicated entries, various vCard versions (2.1, 3.0 and 4.0), or lack of data from incompatible systems can all be generated through manual methods. Using specialized tool such as
WholeClear Merge vCard software is the most efficient and technically sound method available. This tool manages vCard files from various sources, including Google contact, iCloud, Android and Outlook without any structural problems. It can be used on every Windows PC without any compatibility concerns. You should give it a try.