#3 - Sept. 11, 2010, 9:20 p.m.
You will have to download the Mobile Authenticator application from the Android Market and apply that serial number to the account. Chances are the authenticator on your Blackberry may stop functioning properly once you cancel service.
As Maeby stated, you may wish to swap serial numbers as quickly as possible to the account remains protected. In the event that you are unable to remove the serial number currently on the account after switching providers, you will want to contact Account Services for assistance:
Account Services
Assists with: billing issues, password recovery, paid services, subscriptions, payment issues, account management, etc
Hours: 7 AM to 8 PM Pacific Time
How to contact:
Contact page:
http://us.blizzard.com/support/article/contactbilling
International contact page:
http://us.blizzard.com/support/article/international