Hi, I have a friend who is not able to send texts to me all of the sudden, when she tries it says "can't send text"....she doesn't have any problem with texts to anyone else. And I seem to be receiving them from others just fine. My question is, could I have somehow blocked her from texting, even though she can still call me, and if so, where would I find it so I can fix it....she talked to sprint tech support and they were no help. Also, when I send texts to her, she is getting them, but she gets them 4 or 5 times....thanks for any help