Hi - I have an iPhone 3GS locked to O2 - is there any way I can unlock it

Question

Is there a way to unlock my iPhone 3GS from O2 to 3 as service providers?

Answer 1

You either need to be a contract user and it is then free
or a PAYG and it is £15
Here is request form
https://www.o2.co.uk/apps/help/help?qid=1&q1=2&route=unlocking&case=Handset%20Un locking%20Form
Pay Monthly customers
   If you're a Pay Monthly customer, then you can unlock your iPhone* at anytime for free. This doesn’t affect your contract though – you’ll still need to see out the rest of it. This policy may vary according to the handset you have purchased.   To unlock your phone, just fill out this unlocking form and we’ll do the rest.   Please make sure you enter the mobile number that you purchased the phone with, as this will avoid any charges being incurred.   Once we’ve got your form, it’ll then take up to 72 hours for us to get it unlocked for you. 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
  Yes, 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 do the rest.   When we’ve received your form, we’ll send you your instructions what to do in 3 working days for an iPhone and 10 working days for any other phone.   Once you’ve unlocked your phone, we’ll text you to let you know. You can then put a non-O2 Sim into the iPhone and connect it to iTunes.