I have been away for a few weeks and didn't renew my subscription before it expired.  Since then, I've used the Top Up function to buy €20 credit and used €10 of that to subscribe for Guido.  All of this is "logged" on the 48 website.  However, when I try making a call (or, indeed, receiving a call), I get a message saying "Not registered on network."  I've tried going onto the Search Networks function of my Samsung S3 and have not found the 48 network.  I also tried O2, but was told that the SIM could not connect to that network.  Any help would be much apprecaited.