Some contact details may go missing because VCF and CSV store contact data in different ways. A VCF file can hold many details like phone numbers, emails, address, company name, notes, and photos, while CSV works in rows and columns.

Manual method issue:
When VCF contacts are converted manually, some fields may not match the CSV columns properly. That is why phone numbers, email IDs, address details, or notes may appear missing or mixed.

Better option:
For clean conversion, a VCF to CSV Converter can help. Tools like Softaken vCard to CSV Converter are useful because they convert vCard contacts into CSV format while keeping contact fields properly arranged.

Final suggestion:
Manual conversion is fine for a few simple contacts, but for large or important contact lists, using a proper tool is safer and easier.