Phone Number of Bank of America Customer Service is 1800-432-1000. A guide to all the phone services provided by Bank of America and how to get in touch with the customer service. If you are seeking help concerning Home Retentions, Mortgage Services, Credit Card Blocked/Lost, Report a Fraud, File for Bankruptcy, Bill payments or for Online Banking, please contact the numbers mentioned below as per the services required. You can also get connected with the Bank of America customer service to get help via Twitter by using @BofA_Help who are available 8am-9pm, Monday-Friday. 8am-8pm, Sat. 8am-5pm, Sun. (ET).