Virgin Mobile Canada to virgin mobile USA?

So I bought an iPhone 4S that is locked to bell which they say is compatible with virgin mobile Canada carrier, but I'm moving back to United States soon if I unlock it I can use it in united states on the usa Virgin mobile carrier right?

If you unlock it will be able to use it in the USA with the USA virgin mobile, plus any other GSM network from there like at&t or tmobile, even with prepaid SIM cards. But that will happen only if you unlock it, if is locked on Virgin Canada will not work on Virgin Usa