What used iphone company could be switched to a virgin mobile plan?

I want to get with virgin mobile so badly, but imtrying to buy a used iphone 32 gb 4s, what company can i use verizon, att or sprint or t mobile r will i have to shell out the cash for a used virgin mobile phone?

You can Unlock the iPhone 4s to work with another Carrier even with Virgin

Hi Chrissy I work for Virgin Mobile and you can't activate a phone from a different phone carrier yet we don't allow that but we have the IPhone 4s for $649 and the IPhone 4 for $549 sorry for the bad news.

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