Just received a text saying Hi with a smiley emoticon. I responded with hello who is this? and the reply was very similar to the post above saying for me to add trinitygirl7 on yahoo messenger. I said I don't have that but who is this and the texter said their phone battery was dying. And that ended the communication.

We have been getting calls & now text messages from this number.  No one responds when the calls are answered & the response we got from the text was a someone requesting us to add tiagurl8 to our yahoo messenger.  When asked to provide real name communication via text has ceased for the time being.