Virgin Mobile answered your question in the FAQs:
All mobile phones purchased directly from Virgin Mobile, or one of our authorized resellers, include a one-year warranty from the original equipment manufacturer. If you experience an equipment malfunction, call Virgin Mobile At Your Service at 1-888-322-1122 and we will arrange for a replacement mobile phone.
Virgin Mobile offers Phone Insurance. See details at: http://www.virginmobileusa.com/help-support/phoneinsurance.html
How to enroll in Phone Insurance http://virginmobileusa.custhelp.com/app/answers/detail/a_id/3399
Phone Insurance coverage http://virginmobileusa.custhelp.com/app/answers/detail/a_id/3395
AppleCare+ is available, if you're getting an Apple iPhone.
AppleCare+: What it is http://virginmobileusa.custhelp.com/app/answers/detail/a_id/5706/
AppleCare+: Where you can purchase http://virginmobileusa.custhelp.com/app/answers/detail/a_id/5707
Purchasing AppleCare+ http://virginmobileusa.custhelp.com/app/answers/detail/a_id/5708
PLEASE NOTE: AppleCare+ and manufacturer warranty are not available for pre-owned devices.