You are referring to unlocking,jailbreak is the term referred to iPhone.You can get your Blackberry phone unlocked from any vendors online .later unlock it by following this instruction which i found in http://www.mobileunlockguide.com/blackberry-9530
Warning: Do not enter any wrong unlock unlock codes on your Blackberry 9530 mobile phones. If you enter over a certain amount of wrong unlock codes on your mobile phone, your phone may get hard locked and sometimes become unusable.
1 - Switch ON your Blackberry 9530 phone with Not Accepted SIM Card.
2 - Click on Turn All Connections Off.
3 - Press Back button to go Back one Step.
4 - Go to Options.
5 - Select SIM Card.
6 - Press the Menu Key and select Show Keyboard.
7 - Tilt the phone in Horizontal Position so that the Keyboard is displayed in the Landscape Mode.
8 - Type MEPD (letters will not appear on-screen but a menu will pop up).
9 - Type MEP2 (user will be prompted to enter MEP code).
10 - Enter the unlock code.
11 - The Blackberry 9530 phone would then display the message 'Code Accepted' and unlocked successfully!
12 - Go back to the Home Screen. Press the Menu Button and click on Manage Connections.
13 - Click on Turn All Connections On.
14 - The phone will now reboot and 'Activation Required' will no longer be displayed.
*NOT ACCEPTED : We mean, to use a Sim card from a network other than the network your Blackberry 9530 is locked to.