can i use a sony ericsson W995 on virgin mobile?

If your phone is free of any network lock.you will be able to use your phone on virgin,AT&T and T-Mobile.But you can't use sprint.Because your phone supports GSM carriers only.If you have a network locked phone,you will need to unlock 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 TheUnlockArena.com Here you can unlock your phone at low cost.