Step 1: Go into options
Step 2: Go to advance options
Step 3: go to host routing table
Step 4: Hit your menu (bb button) hit regeister
Wait 10 secs and check for net icon
Use the the Blackberry BIS page here: https://bis.na.blackberry.com/html?brand=vzw
Once you log in with your Blackberry username/password there will be a link on the left that says "Change Device", click this to enter your new PIN/ESN number, then go back to the mainpage and click on "Service Books" and have them resent. This should have the Web/Email icons recreated.
Or you can also access this set up thru the Email Settings icon on your phone.