how to unlock iphone without sim card

You can't without a sim card.

if vodafone unlock my iphone what will i do next?can i use itunes

open it?

i dont have a vodafone sim card coz my sister gave her iphone 4 to me...she is in uk and i am her in the philippines...she already went to vodafone yesterday and they said to wait for 7 days before they open it...they will send email to confirm the activation...MY QUESTION IS WHAT WILL I DO TO AFTER THEY CONFIRM IT..

iPhone: Troubleshooting authorised unlock issues

http://support.apple.com/kb/TS3198