Spam messages: no number, just a name.
I've been getting numerous spam messages on my iphone - never with a number, just a name (which comes up on the message, despite my not having the person as a contact). They're happening daily - and apart from being annoyed (which I am) I want to know how they can name sender, and not have a number attached (when I hit the 'i' it just says the name, nothing else). They're not iMessages as they're not blue, always grey. I haven't tried calling the sender, because I don't want them to see that my number is active (if they I even do that, which I'm not sure because this whole thing is confusing).
Also, any ideas on how to stop these?