If you're on the BB data plan, switching to an iPhone is not a problem, You just need to make sure you've got the correct APN settings when you start up the iPhone.
Also remember the SIM card in the iPhone is smaller, so you'll either need to do a SIM swap or some surgery.
But on the plus side, I knocked over the SunSphere.
U/L E&W at 6PM
U/L Picture/Video/Text Messaging
CDN LD @ $0.10 per min
USA LD @ $0.20 per min
6 GB Data
U/L Bell to Bell Local
$55/month with no SAF/911
The Former Abbywack-A-Mole