Unlocking iPhone without SIM

[Anonymous]

I have an iPhone 5S and have "SIM swapped" the old micro SIM to the new nano SIM. I now want to give my old iPhone 4 to a relative but they need it unlocked (they don't use O2).  If I have O2 unlock the phone, are they able to do it without an O2 SIM being inside the phone?  Obviously I have now transferred my number to the nano SIM and have destroyed the old one.  Or do they simply need the IMEI?  A quick look at the online form asks for the phone number and not the IMEI which is why I'm wondering if this is going to be a problem.

Thanks.

[Anonymous]

Hi

I am sure you need to give your imei number at some point. Also when entering the unlocking code, I think you have to have non o2 sim inserted for it to work.

@bandofbrothers, can you assist OP further please?

PS. You have to provide the imei number at the end of the online form.

[Anonymous · Accepted solution]

All the op needs to do is fill in the unlock form.

The number they use is the one they've been using whilst using the old iPhone as it's latched to their imei number.

When they get the e mail then they insert their alternative sim in the phone and hook up to iTunes to complete the unlock.

https://www.o2.co.uk/apps/help/help?qid=1&q1=2&route=unlocking&case=Handset%20Unlocking%20Form

[Anonymous]

How to get the imei number.

http://support.apple.com/kb/ht4061

It's on the sim tray.