iPhone to iTouch can't text
i have an iPhone 4 and we just bought an iTouch for my daughter. the advertisement material indicates we should be able to text or do facetime as long as there is a wifi connection. I can't figure out how to do it.
on the iTouch, when she tries to message, me she gets an error that i am not signed up for iMessage. from the iPhone, i can't see anyway to identify her. do i need another software to message her? the software that came with her iTouch looks like the same messaging software i use. i do know she was able to message her friend that has an iPhone.
What am i doing wrong?