I work for AT&T. Your particular situation is a rare one. But i would be careful because in your case you have an iphone and a blackberry. Each device has its own particular data plan to be put onto. So if your on a blackberry data plan and your using your sim card in the iphone and even though it works using your email and logging on the web you might get a VERY HIGH BILL. In other words. if your using the blackberry you have to have the blackberry plan. If your using the iPhone you have to be on a iphone data plan. When a phone is not provisioned correctly with the right data plan, you might get away with it for a while but eventually our system will detect that you have a wrong data plan and you will get a bill as big as a rent payment. Ive seen this happen in the past when customers get a windows phone and have a blackberry service plan. Ive seen bills as high as $1000. You have to pick what phone you want to use and get the right data package. Hope this helps.