Originally Posted by pip22
And only do an OS update if that version is approved by your carrier. Usually there will be a link on your carrier's website for BlackBerry users, which takes you to the appropriate RIM update page approved by your carrier.
If you install an update from RIM via any other method it may not have your carrier's approval and there's a chance the update might do some strange things to your handset.
This is NOT true. RIM builds all of the OSes and then the Carrier releases them as they wish. The OS will only work with your model device, so it doesn't matter which carrier releases it.