Missing Address Book File / iPhone syncing issues

Hi,

I have a MacbookAir running 10.7.5 and a new "used" jailbroke 3G iphone.

I'm trying to sync my contacts in my macbook with my iPhone.

I've synced it to the iPhone like I'm supposed to but can't find on the iPhone where any of the contacts I've synced are. When I go into the phone's contacts after the sync there are no contacts.

A link told me to go to Finder to access them and sync them manually. The link said to find them here.... <home>/<library>/<application support>.

When I go there there are no files relating to Address Book or Contacts.

But I do have contacts in my Address Book whenever I open it up in my Macbook.

Any help would be appreciated.

Thanks...Ken