We have the phone number required for both billing and delivery addresses. If you tick the box to indicate the delivery address is the same, all the info carries down except the phone number. Is this a known problem, or just something we need to find and fix on our own sites?
 
thanks :)

Ive just tried it here on 3.5 and all three (phone, daytime phone and evening phone) all transferred to the delivery fields.
Are you using an earlier version?