I'm a newbie to the BB. Corporate got me a T-mobile plan and a 7290 about a month ago. Everything works great, except I hate the size of the unit. It's too big and ackward to talk into. I thought I'd try a 7100t, so I bought one off of ebay. Switching the SIM cards is easy enough. What do I have to do in order to get email? My company is running a BES. Do I have to update my PIN in the BES or is switching the SIM enough? I've tried calling our BB admin, but he seems to be in his special education classes this week.