Ok, I know there have been many questions out there about this. As like many, I love my iPhone but I also love my PDA phone. Both have strenths and weeknesses but the question is... Can you have both. I have heard that if you take your SIM from another AT&T phone and insert it into the iPhone, it will work but you will be charged for the internet my the kb and also some things will NOT work such as visual VM and youtube and such... This may be due to the fact that when you connect your iPhone to iTunes for the first time, it will marry the phone to the SIM inside. Not sure how true that is or not but tell me this, what would happen if you had AT&T program your iPhone SIM that you have been using in your iPhone for some time and put it in a PDA phone with the PDA plan. I know this works and have tried it. After a few weeks of having it in the PDA phone, what happens if you put it back into the iPhone..? Lets just say if everything works 100%, would it be safe to say that you are NOT getting charged by the kb when using the internet? How would you even know if you were..?