can i unlock virgin mobile iphone?

Contact the carrier and ask.

Virgin Mobile says they will: https://community.virginmobile.com.au/t5/Phones-knowledge-base/How-do-I-unlock-m y-Apple-iPhone/ta-p/80

Virgin Mobile in the US will not unlock your iphone nor any brand of phone.

This in an email from them on Dec 29, 2013:

"You will be unable to activate your iPhone 4S on another carrier since

we do not provide unlock codes to any of our phones. We are sorry about

that."

A customer service rep also told me that they are planning to provide unlock service "in the future"

BTW: the iPhone 4S and later are 5 band phones, so if you could get it unlocked via jailbreaking or other means, you could use it on a GSM (SIM card) network.

Final Point: People complaing that they payed Virgin Mobile "full price" for their iPhone, so should be able to get it unlocked. This is actually not true. Virgin Mobile charges at least $100 less than Apple does for an unlocked phone.