iPhone 5s unlocking issue

[toniock7]

I have just left Vodafone and transferred my number over to O2 who I am now with. I am wanting to give my iPhone 5s to my friend who is on 3.

I have submitted a form but they can't match the IMEI number to the one on my account.

About half way through my contract, I had to get a new phone as the one I originally had statrted playing up - the touch screen stopped working, so how can I get an unlocking code?

This is so stressful.

[BandOfBrothers]

"What if I have my iPhone exchanged?

If the handset has been exchanged by Vodafone UK then we can still request that your phone is unlocked with Apple. If the handset is exchanged via Apple or another third party (e.g. insurance claim) you’ll need to contact the company that provided your replacement for either an unlocking code, or you can ask the third party to notify us of the new IMEI details. We’re only able to request handset unlocks for phones that have been sold by Vodafone UK or if we've received the new IMEI details from the third party."

from http://forum.vodafone.co.uk/t5/Pay-monthly-account-specific/Unlocking-your-phone-NUC/m-p/2421841#M1