Indian Overseas Bank (IOB) Mobile Banking Registration, How to Update/Register Your Cell Number with Indian Overseas Bank, The national bank Indian Overseas Bank follows the Reserve Bank of India's standards. ekhan.net The bank has been offering a variety of handy services and facilities to its public banking clients. Indian Overseas Bank (IOB) Mobile Banking Registration, How to Update/Register Your Cell Number with Indian Overseas Bank, The national bank Indian Overseas Bank follows the Reserve Bank of India's standards. The bank has been offering a variety of handy services and facilities to its public banking clients.