O2

Thanks for your reply, yes tried manual network selection, no luck. It states sos only as opposed to no service on selection.

Ps I cannot ring customer services from the phone with no service 

I am having the same issue on a pay and go and am keen to keep my number when abroad for 1 year and use it for authentication request. I arrived into Melbourne, the SIM card worked for a few days and now only displays no service. Could o2 have placed...