How do I update my iPhone contact list from my computer.
If you use iCloud you can go to iCloud.com. If you use Google you can do it on the web.
Your apps market will have a backup assistance app
red square with refresh arrows in it, It is free, just download from your house wi fi (so you are not charged for data use)
Setup will guide you though everything. Then it will update every day if you choose that in your setup.