Who called from 7812054595

I got a text from the same number but they text back asking me if I used yahoo chat and then have me the user name txtchikie2 to chat with them. Then I was persistent in asking who it was and they said sorry but there phone was gonna die! But they knew my name...

Same thing happen to me they used the name txtiegirly02

Same but wanted to im at txtieflirt369. Said not if don't say who you are, said phone dying ..

11/20/2012 @ 2:50 pm AZ time -
Rcvd text: hi Bridget
My reply:  hi. Who's this?
2nd text rcvd:  Do u use Y! chat? Cuz I'm me my username is textiegirly38
My 2nd reply:  Go away.
3rd text rcvd: Omg .. mi android s goin to die ;'(
My 3rd reply:  And y should I care? This # is on the national do not call list so if I have no idea who u r ...personally, please do not text or call. Have a nice life.

This person just did the same thing.... what is it?