| 摘要 |
PROBLEM TO BE SOLVED: To automatically update an electronic file of a portable communication device while securing reliability. SOLUTION: The contents of the upgrade file include information to repair errors in software components of the portable communication device and/or information to upgrade functions of the portable communication device. The portable communication device automatically upgrades the software components using the upgrade file contents. The portable communication device automatically recovers to an operational state when detecting an error or failure during the automatic upgrade. Further, the portable communication device resumes or reinitiates the automatic upgrade following the error or failure. COPYRIGHT: (C)2009,JPO&INPIT
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