Switching my Rogers SIM into a Bell Phone?

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.

You can unlock the Blackberry Curve from Bell using the unlock code from Theunlockspot.com and remove the network lock permanently.Once unlocked you can swap to Rogers network.