Mobile handset with a fault tolerant update agent

A method for updating an electronic device having a nonvolatile memory is disclosed. One embodiment of the present invention may permit the update of the second version of the code to the electronic device from a first code version using a fault-tolerant, bank unit method. Update package comprising update instructions may be received via a public and / or wireless network, it is possible to convert the first code version to the second code version using the update command. Bank order of the conversion may be specified in the update package, and may be a non-sequential manner.