Yes, but you'll need to buy your own new phone.
Here's Virgin Mobile's answer from the FAQ:
Swap your Virgin Mobile phone online
If you're a current Virgin Mobile customer and you've bought a new phone, you'll need to do a phone swap to switch your mobile number to the new device. There is no charge to complete this transaction online.
Simply click here to log into My Account with your phone number and 6-digit PIN. Choose Swap Phones from the 'I Want To...' menu on the right of the Account Overview tab. Next, you will need to enter the ESN number from your new phone and follow the steps to complete the phone swap.
Customers who purchase a Blackberry phone must complete the phone swap with a Live Advisor at 1-888-322-1122, with no additional cost.