HI no you can't use your Blackberry phone with any other network sim until you unlock it from rogers network ..You can easily unlock your phone using sites like UnBBlock.com here they are rendering unlock code for all blackberry mobile models at reliable cost ..After unlocking your phone you can freely use your phone with any GSM sim ..Even though it is unlocked you can't use it with verizon since it is CDMA network..Phone unlocked from GSM network is compatible with other GSM sim and not with CDMA vise verse for CDMA .....