I have a phone interview coming up and the only phone line I will have access to is my iPhone. I need to turn off my call waiting to avoid the annoying interruption of beeps and hang up noise during this call. I have searched other forums and even found video on how to do this but I don't seem to have the same settings as the iPhones ( I am guessing iPhone 3) they use in their examples. I really need to know if this is an option. It would be greatly appreciated. Thanks for any answers!