Hello, need some help!! I just got my iPhone 6 and it's worked perfectly until today. I can't send SMS (green) txts. I can receive them but can't reply. I can send & receive iMessages though. It happened right after I recieved a picture txt from a non-iPhone user that wasn't in my contacts. I've checked all my settings and everything appears to be right. It was working just fine one minute & then suddenly, after receiving the picture txt, I haven't been able to send any SMS texts.