Unlocking iPhone without SIM

[Anonymous]

I have just submitted a request for O2 to unlock my iPhone 4 on PAYG.  My balance is over the £15 required.  I have an iPhone 5S and I want to move my number over to the SIM inside it.  I have entered the relevant information and submitted the 'unlock' form on the O2 website.  Can I now go through the SIM swap and transfer to my new SIM in my new phone or would this prevent O2 from unlocking my old iPhone 4?  Do I need to wait for O2 to unlock the iPhone 4 before I make the transfer?  My understanding is that this is done through the IMEI rather than through anything else, but I want to make sure I don't create any problems with doing a SIM swap while this takes place.  How long does the unlock usually take in practice?  The FAQ says 3 days, but the "submitted" page said 14 days!

Any assistance much appreciated.

[Anonymous]

Your iPhone 4 imei will be latched to your account as long as you've been using it to make chargeable calls.

You just need to perform the swap my sim procedure to move your number and tariff from the micro sim you used in your iPhone 4 to a nano sim for your iPhone 5 as you state.

Personally I would wait until you receive the unlock email but that's just me.

One thing at once !

You will receive a e mail in a few working days and just insert a non 02 SIM card in the iPhone 4 and hook up to iTunes to complete the unlock.

[MI5 · Accepted solution]

It won't make any difference as the credit will transfer across to the new sim and the number will be the same so when they take the money from your sim it will be just the same regardless of which sim you are using.