Free Sonic Cheeseburger with purchase of same and medium drink. Redemption Instructions Log in to view the redemption instructions for this offer. Participating locations include: SONIC 700 MS-6 Batesville, MS 38606 Phone: 662-563-4566 Map Sonic 525 E Lee St Sardis, MS 38666 Phone: 662-487-3839 Map Sharing Options Share Offer Copy Link