If you are moving from another mobile phone to an iPhone, if you first sync your old phone to your Address Book it will bring all your numbers into your iPhone. Likewise, you can copy all your address book contacts onto your mobile phone from your iPhone or Address Book. Here’s how.
On your Mobile turn on bluetooth and make sure the phone is discoverable.
On your Macinotosh go to System Preferences:Bluetooth.
If it’s off turn it on.
Click on the + sign to add a new device.
Your phone should appear: select your phone.
You will get given a password on your screen and your mobile will ask for a password. Type it onto your phone.
Open iSync (Applications:Utilities:iSync)
select the menu Devices:Add Device
When the phone appears, double click it.
Now your phone will appear in the isync window. Set up the settings as you want them.
Finally click ‘Sync Devices’ and it will fill your phone with all your Address book contacts.
Here is a list of all the phones that will sync with iSync: