I also had the same issue, and what suited me best was the GainTools CSV to vCard Converter. It does gentle CSV to VCF conversion and stores all of your contact details securely, including names, emails, and phone numbers. The most wonderful thing about it is that it is compatible with all versions of vCard, which means that your file can be imported into any phone or email client. The utility facilitates fast and easy CSV to vCard converter, even of big files. It’s a stable utility that operates flawlessly on all versions of Windows.