Does anyone know where my 3G symbol has gone, or why it's been replaced with a circular symbol? (Top of screenshot). Very possibly it's been there before and I just haven't noticed, but wanted to check whether this was anything to worry about, or whether I had perhaps accidentally told my iphone to work on some other, circular(?), non-3G network. Cheers ps, sorry if this has been asked and answered already, I did search for it before posting.