Can a US Cellular Phone (S3) be unlocked for use on a Sprint network?

My phone shattered and a friend has a brand new US Cellular SIII to give me. I have the Sprint network. Is unlocking possible?

via Forums de téléphone cellulaire (en français) http://cellphoneforums.net/fr/us-cellular/t363926-un-t%C3%A9l%C3%A9phone-cellulaire-us-s3-peut-%C3%AAtre-d%C3%A9bloqu%C3%A9-pour-une-utilisation-sur-un-r%C3%A9seau-de-sprint.html