How much does it cost to unlock an iphone 4 on Vodafone?

I want to unlock my iphone 4 because Vodafone charges 24p to use FaceTime so I'd need a rough idea of how much it would be in phone shops or phone repair shops?

$100-$150 at vodaphone. Try the dodgy asian stores.

Hi, You can definitely unlock your Vodafone network locked iPhone 4 using remote unlocking service at just $83.30 from http://www.unlock-zone.com/apple-iphone-4/rs5wp9/ This is a safe and permanent method of unlocking an iPhone. It doesn't require a jailbreak too.

The price will vary… But check here: http://gsmunlocklabs.com/unlock-iphone/

it's a permanent unlock that involves no jailbreaking, etc.