Indian Overseas Bank (IOB) Mobile Banking Registration, How to Update/Register Your Cell Number with Indian Overseas Bank, The Reserve Bank of India’s guidelines are followed by the national bank Indian Overseas Bank. ekhan.net The bank has been providing its clients in the public banking sector with a wealth of convenient services and amenities. Indian Overseas Bank (IOB) Mobile Banking Registration, How to Update/Register Your Cell Number with Indian Overseas Bank, The Reserve Bank of India’s guidelines are followed by the national bank Indian Overseas Bank. The bank has been providing its clients in the public banking sector with a wealth of convenient services and amenities.