Unlock and imei issues
My iphone 4 has just completed my two year contract with vodafone. However in this time my phone broke and I used apple to repair it. Which in fact is actually a switch service. So now I have a different imei number than what I started with. I rang vodafone to unlock my phone, but they say they can't and there is nothing they can do as the phone was not issued by them. I also can't seem to find a way to unlock my phone via apple. So what can I do??
Any help would be awesome!
iPhone 4, iOS 6