| 摘要 |
<p>Mobile equipment for a cellular telephone system has its software modified so that the equipment can restore to usability a SIM card in a locked state. The software detects if a datafield on the SIM card can be read, detects if an unreadable datafield can be written to and, if it can, writes initial information into the unreadable datafield to restore the SIM card to usability.</p> |
