SIM not working overseas

[mumblescassidy]

Hello, I have recently moved to Australia for a short period of time and still have my UK sim which I need but since I have arrived here the sim has stopped working. All I get is an SOS symbol at the top of the screen.
I'm unable to access my account online properly either as it requires me to use a PIN that gets sent to my UK number. Could you please let me know a solution to access my UK number again?

[pgn]

Have you enabled roaming and data roaming on your phone, @mumblescassidy?

Reboot your phone.

Manually search for a network.

Check you data APN is set to mobile.o2.co.uk

Toggle airplane mode off and on.

Contact O2 via Social Media to remove any roaming bar:

Guide: How to find help & contact O2 

Guide: Roaming MegaGuide 

Good luck!

[Enlli]

O2 via social media will send a PIN via text once they have confirmed some other security items