Nokia Lumia 800 - What is the Contacts Transfer 1.7 application on my Lumia device?

With the Nokia Contacts Transfer 1.7 application you can transfer the contacts from your old phone into your Lumia WP 7.x device.  Only requirement from the old phone is Bluetooth (via PBAP or SyncML) support.

Contacts Transfer 1.7 introduced the support for older Nokia S40 and S60 3.1 or earlier devices, in which case SyncML protocol is used.