does cingular charge extra for call waiting? I got a call from my dad saying that my cell phone bill was $400+ he said that there were $10 charges for call waiting... I know that I've switched over and back if I had a call waiting... sometimes for about 5 or so minutes... I can't access the account by website because I'd need my dad's ss# and he's pretty pissed at me. I'd like to know what's going on before going home for thanksgiving break and having to explain it to him.