Zila Sahakari Bank Varanasi mPassbook is a mobile application on mobile devices which shows all the account-related details of the customer available to him through his account passbook on the mobile phone app in a Smartphone. The main feature of ZSBL Varanasi mPassbook is that the customer is provided with the account passbook on his mobile handset. Whenever the application is opened it synchronizes and updates all the latest transactions of all accounts of the customer.