Method for storing elementary file of card in subscriber identity module for e.g. smart phone, involves storing file content in volatile memory area of carrier for use during operating data carrier when file includes determined attribute

摘要

The method involves receiving (17) a file content i.e. updated file content, of a file in a portable data carrier during operating the data carrier. An attribute i.e. high update activity attribute, of the file with the received file content is checked (18) by the data carrier. The file content is stored (19) in a volatile memory area i.e. RAM, of the data carrier for use during operating the data carrier when the file includes the determined attribute. The file with an original file content is stored in a non-volatile memory area i.e. ROM, of the data carrier. Independent claims are also included for the following: (1) a computer program product comprising instructions for performing a method for storing a file in a portable data carrier (2) a portable data carrier comprising an integrated semiconductor circuit.