Hi, I'm new here. Nice forum... I'm currently a blackberry user on AT&T and I have an AT&T issued iPhone. Since I use the blackberry for work (primarily email), I'd like to use the iPhone for the internet. I currently have a voice and blackberry data plan, but not an iPhone plan. Will I be able to access the internet with my 3GS? Can I have a blackberry data and iPhone data plan simultaneously? If the iPhone was not originally associated with my number, will I have any problems registering my iPhone with my itunes account? The phone works when I switching the sim card, but I'm unable to access the internet using the AT&T network even though I have an AT&T data plan. If this topic has already been covered, I apologize for the redundancy. If anyone can point me to a thread that discusses this issue already, I'd appreciate it if you would point me in the right direction. Thanks for the help!