Registration for Indian Overseas Bank (IOB) Mobile Banking, How to Update/Register Your Cell Number with Indian Overseas Bank, The recommendations of the Reserve Bank of India are followed by the national bank Indian Overseas Bank. ekhan.net The bank has been offering a variety of handy services and amenities to its public banking clients. Registration for Indian Overseas Bank (IOB) Mobile Banking, How to Update/Register Your Cell Number with Indian Overseas Bank, The recommendations of the Reserve Bank of India are followed by the national bank Indian Overseas Bank. The bank has been offering a variety of handy services and amenities to its public banking clients.