If some contacts are missing after converting Excel to VCF, the problem is usually incorrect field mapping or using an unreliable converter. This happened to me when I used an online Excel to vCard converter for a large file. Some contacts were missing phone numbers and others were duplicated.

Manual conversion using CSV can also create formatting issues. Excel columns like first name, last name, and mobile number dont always match correctly with vCard fields, which causes errors in the final VCF file.

The best solution is to use an Excel to VCF converter that allows preview and mapping before exporting. That way you can check all contacts and ensure each field is correctly aligned. I switched to Gaintools Excel to VCF Converter, and it solved the missing contacts issue completely. All fields were mapped properly and the conversion was accurate.

If youre facing conversion errors, avoid online tools and use a reliable converter that supports proper mapping and bulk Excel to VCF conversion.