Unlocking an O2 iPhone and using it on a different network
Pay Monthly and Pay & Go customers
If you're a Pay Monthly customer, then you can unlock your iPhone at any time, for free. This doesn't affect your contract though – you'll still need to see out the rest of it. This policy may vary depending on your phone.
We won't be unlocking iPhone 6 or iPhone 6 Plus for a while. We're prioritising our stock of these devices for customers who want to use them on the O2 network. The exception to this will be O2 Refresh customers who've completely paid off their Device Plan in full - we will therefore allow iPhone 6 and iPhone 6 Plus to be unlocked.
To unlock your phone, just fill out this unlocking form and we'll do the rest.
Make sure you enter the mobile number that you bought the phone with, to avoid being charged.
Once we've got your form, it'll take up to 72 hours for us unlock it. Once it's unlocked, we'll text you to let you know. You can then put a non-O2 sim into the iPhone and connect it to iTunes. iTunes will then tell you the phone is unlocked.
Pay & Go customers
You can unlock your iPhone or any other brand of phone locked to O2. It costs £15.00 and we'll take this from your Pay & Go balance.
Once you have a balance of £15.00 or more on your phone, just fill out this unlocking form and we'll look after the rest.
We'll send you an unlocking code and instructions within 3 working days of receiving your form.
We'll text you to let you know when your phone's been unlocked. You can then put a non-O2 sim into the iPhone and connect it to iTunes.
https://www.o2.co.uk/apps/help/help?qid=1&q1=2&route=unlocking&case=Handset Unlocking Form