Being even more of a numpty with a mobile than I am with a computer, I have just swapped over my phone. I had a Microsoft Lumia, which I didn't get on with so feeling bold, when my Wife upgraded her Samsung, I decided to use her old Samsung Galaxy Ace 2, as that is easier.
I put the Sim from my Lumia into the Galaxy, expecting the information to be transferred but it wasn't. All the calls logged and contacts my Wife had are still on the Galaxy but we sorted that out and now have an empty phone to work with. Unfortunately, I have fallen at the first hurdle. When I make a call, I get a message saying "not registered on network". What does that mean ?