Is the Virgin Mobile HTC Legend compatible with Rogers 3G networks?

I originally bought a Rogers HTC Dream but now its outdated and really slow, but I'm stuck with my contract for 3 years. I want to get a new phone, the HTC Legend. If I just bought it without a contract from virgin, and then unlocked it and put in my Rogers SIM card, would it still work? I'm not sure what Rogers networks are, but the HTC Legend supports Dual band 850 / 1900 MHz and Quad band 850 / 900 / 1800 / 1900 MHz.

Yes,you will do it.
For unlocking you can approach your service provider or else try to buy an unlocking service from any one of the online unlocking service provider like TheUnlockSpot.com Here you can unlock your phone at low cost.