Transferring a number to O2 - does the phone have to be in the UK?

[EamonnN]

I have just joined O2 and want to transfer my number from my old network to O2. I have a PAC code from my old network. I have heard somewhere that my phone has to be in the UK on the day of the transfer. Is this correct? as I will be out of the country for next few working days. Thanks 

[MI5]

@EamonnN 

The transfer will take place on the O2 system but your O2 sim won't register the change until you connect to an O2-UK signal.

[EamonnN]

Thank you @MI5 for the quick reply. Does that mean my phone will still work(on roaming) on the temporary O2 number that was supplied with O2 sim until I reconnect to O2-UK network?

[MI5]

@EamonnN 

I've never been in that situation myself to confirm, but in theory, yes.