Find the toll-free numbers, email IDs and address of IOB branches for various queries and issues related to credit cards, loans, net banking and more. Fincash also provides information on IOB products, services and benefits for NRIs and Indians. Indian Overseas Bank 24"7 Customer Care Toll-Free Number Customers who have any queries/complaints can call on the following toll-free number from any mobile or landline number. 1800 425 4445 If you suspect any fraudulent activity in your Credit Card Account call on our 24x7 help line no. Toll free number - 1800 890 4445, Phone Number - 044-28519574/28519575 immediately. To take care of the specific needs of these customers, the bank operates an efficient customer service department to handle all queries and complaints. The customer service department of IOB can be reached in multiple ways. If you wish to take a personal loan from IOB, you can use the details given here to clear your doubts and complaints. Toll-free numbers of Indian Overseas Bank The customer care team at the Indian Overseas Bank is available round-the-clock to help its customers with any ...