Can I use Virgin's HTC Legend with Bell?

I currently have one year left on my Bell contract. I'm getting the HTC Legend. I wanna get it from Virgin Mobile because their price is $350, whereas Bell's no contract price is $400.

1. Would I be able to use Virgin's HTC Legend with Bell?
2. Will Virgin unlock it for me for free? If not how much do they charge to unlock?
3. Will it require a data plan?

Thanks a lot

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