HI unlocked blackberry is nothing but the phone is free to any GSM network in any countries..Usually phone comes for sale locked with network provider due to this they can't be used with other network sim until we unlock it ...If you are in need to unlock your blackberry mobile from network lock then have a look at sites like UnBBlock.com here they render unlock code for all blackberry mobile mdoels at reliable cost ..After unlocking your blackberry mobile you can freely use it with any GSM sim in any countries ...