What is an unlocked Blackberry?

[Amy]

What does unlocked me?

How do you make a phone be unlocked?

[geeth]

hi
friend unlocking is nothing
that your blackberrry get locked to a particular network
due to this it won't work with other network sim
to remove lock
you can
software,codes
its better to use codes to unlock
you can get the unlock codes at this site
Super Unlock Codes - Blackberry Supported Models
it will help you.

[tonyroger123]

An Unlocked BlackBerry means it can be used with any Network around the world.
The best way to unlock your BlackBerry is by entering the Unlock code(MEP code) to your BlackBerry.
Always go for a trusted vendor to purchase the unlock codes.