Southern Michigan Bank & Trust, Southern Michigan Bank & Trust Basic Info Reviews Routing Numbers Map & Direction Name: Southern Michigan Bank & Trust, Southern Michigan Bank & Trust Main Office: Yes Service: Full Service Brick and Mortar Office Location: 45-51 West Pearl Street Coldwater, Michigan 49036 Branch County View other branches Phone: 800-554-8969 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer072402283YY072402610YY072414459YN From: To: