Uh-oh, I hope I didn't make a boo-boo here...I've built an app that I have been testing on the simulator which uses NSStream and NSHost to do some sockets programming. I had to add in the core services framework to my project in order to build on the simulator, but now when I try to build and deploy to my device it fails with an error "framework not found CoreServices". Can I not use NSStream etc on the iPhone? Or is there some other way I should set up the project to do so? If I can't use NSStream what is the alternative suggested way to do tcp streams socket (I need something lower level than NSUrl)?