Can I use a non contract payment plan with Virgin Mobile?

Can I use a non contract payment plan with Virgin Mobile?

Added (1). Can I use a non contract payment plan with Virgin Mobile on an Iphone 6 which is UNLOCKED. Non contract payment AkA pay on their website like I do now with my current phone but simply pay a month of what I want at a time? Pretty much just asking if I bought a unlocked Iphone 6 could I use Virgin Mobile on it?

Virgin mobile has no contracts so if they adjust like data usage it will aplly to you no matter what since you don't have a contract

I do. I pay $33/month for unlimited voice, text, and data (although they will throttle the rate after something like 2.5GB). When I started the service, there was a limit on the voice minutes, but it was more than I ever use. But if I was someone who spoke on the phone a lot, then it would have been a welcome free upgrade.