Originally Posted by vdubster
Does this remain true even if the Hosted Service is a BES Express, which I hear works with BIS data plans?
It depends on the carrier. Rogers, Telus, and Bell require you to be on either a BIS personal plan or a BES business plan on your device. Where as Virgin Mobile Canada in corporated both BIS and BES on personal accounts.
Unlocking the device itself so you can use it with another carrier has to be done either through the original carrier or through a 3rd party source, BES has no control.