Migrating from Baya V3 to Baya V4
Baya V4 and Baya V3 integrate the same address book server. Get access to all the contacts saved in Baya V3. As the address books from Baya V3 are synced in Baya V4 automatically. You don't have to transfer contacts from Baya V3 to V4.
Migrating from Baya V2 to Baya V3
The personal address book created in Baya V2 will have to be migrated to Baya V3. The instructions to do so are given here.
Migrating from Baya V2 to Baya V4
The personal address book created in Baya V2 will have to be migrated to Baya V4. The instructions to do so are given here.