My dad is no longer using his Blackberry Curve and said I could have it, but the only problem is it's on Bell. I have a LG Xenon with Rogers. If I put my SIM into his Blackberry will it work as normal?

If that won't work, what would I have to do in order for me to use his Blackberry?

Thanks in advance.
PS I don't want to switch my plan. I'd like to keep the same plan and stay with Rogers. If that's even possible.