01-31-2011 06:00 PM
Once unlocked, forever unlocked.
02-01-2011 02:28 AM
From a PC, you can install any OS package to a BB via this procedure:
Note that while written for "reload", it can be used to upgrade, downgrade, or reload -- it all depends on the OS package you download and install to your PC. You can even use a different carriers OS package by simply inserting, between steps 1 and 2, the deletion, on your PC, of a file named VENDOR.XML. Be sure that you remove, from your PC, any other BB device OS packages as having more than one installed to the PC can cause conflicts with this procedure.
If you are on MAC, you are limited to only your carriers sanctioned OS packages...but can still use any levels that they currently sanction. See this procedure:
Good luck and let us know!