M&T Bank Customer Service Phone Numbers Customer Service: 1-800-724-2440 Online & Mobile Banking: 1-800-790-9130 Business: 1-800-724-6070 Commercial Service Team: 1-800-724-2240 Mortgage: 1-800-724-2224 Mortgage Transfers: 1-866-462-1156 M&T Bank Headquarters Info, Email, Phone number, Website and live chat
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