unlocking with Vodafone
Vodafone state that there is usually no charge for unlocking your phone after 12 months, but that you should phone their customer service team to check. Otherwise, pay monthly customers can expect to pay around #15.32, whilst PAYG customers will be charged #19.99- this will be taken form your top-up balance, so make sure you have enough credit.
To unlock your phone, call 191 from a Vodafone number, or 08700 700191 (Pay monthly)/ 08700 776655 (Pay-and-go)
Vodafone also provide an online form to make it easier to unlock.
Turnaround time is from 24 hours to 2 weeks depending on your make and model.