FORMAT REFERENCE
vCard 2.1, 3.0, and 4.0
The version line tells a receiving application how to interpret a contact card. In real exports, compatibility matters as much as the standard.
Last reviewed
At a glance
vCard 2.1 is common in older exports, vCard 3.0 is a broadly compatible interchange choice, and vCard 4.0 is newer but not universally accepted.
Conversion guidance
Convert a copy, preserve unknown properties where possible, and review warnings before importing. Do not overwrite the original backup.