I can't buy credit in the shop anymore. It was available until last month. Why is this. Also, every time I try to buy credit online it sends an error after I put in the code they send me. Can't buy the credit.
No, it didn't work. I had no idea how to change the settings manually so I've just changed network I'm afraid. I needed it sorted. And this phone has 4g which I have now. Thanks for the help though.