I don't know what kind of trouble your daughter is in, and I'm afraid I can't help you - but I wanted to point this out to others that have kids under 18 with smartphones, dumbphones, or anything at all - even a laptop in their room. I'm no parent yet, and probably won't be all that soon, but I did grow up with a number of computers, and managed to make have a personal cellphone during my high school years. (It -did- have texting, but I never opted into that service as I thought it was too big a pain!)
Teenagers.. like to keep things from their parents. Sometimes the planets align and you don't have that much trouble. A computer in the family room is one thing because you can walk by and get a gist of what's going on - it might lead to some 50 year old freak in Oklahoma hitting on them, but that's about it. Right?
A computer in their bedroom.. a little more private. Still, a desktop and a network that you can log/keep an eye on.. not that much to be worried about.
Laptops can make it into locked rooms, and bathrooms, and what have you, but it's pretty damn obvious, and laptops only go as far as wifi goes.
Cell phones, are sneaky little devices that are independent, and can be locked - it sounds like the OP's daughter set her phone to auto-wipe after a few wrong code attempts. In other words, the info you want? It's already been wiped so you'll need to get a little bit 31337 h4xx0r.
Ultimately, the root of all problems isn't that these forms of communication are available, but the behavior involved that causes them to be misused.
That said, I don't understand why a teenager needs text messaging or even anything outside of a small minute bucket to keep in touch with family.