Hi there. I am not sure if it can take or recieve pictures but it sounds like someone is sending her a text with a picture in it. I have seen similar, it's all numbers and letters and symbols all mixed up. If it is supposed to take picture messages then it may be that part of it on the blink. If you want, I can send you a picture and you can compare the texts and see if that is the problem. PM me or e-mail me if you would like me to do this for you.
Paul.