My son just brought me his phone in tears because of the photo he received (twice!) on his phone. Two different numbers appear to have sent the message. When I call them, one insists that he didn't send it; the other went straight to a generic voicemail. Anyone have any suggestions? He's had this phone about nine months and received a couple of inappropriate jokes through texts, but I intercepted them and called the sender who apologized and promised to remove the number from his address book (recycled number), but this is a new one. The sender that I reached swears he didn't send the photo. Help! I don't want these images burned into my son's mind.