A vehicular wireless apparatus continues a standby state even after an ACC switch of the vehicle is turned off. In the vehicular wireless apparatus, when it is determined that the ACC switch is turned from on to off, paging area information stored in a RAM (volatile memory) is stored in an EEPROM (nonvolatile memory). When the ACC switch is then turned from off to on, a power-on-reset is done for the whole of the vehicular wireless apparatus and paging area information stored in the RAM is reset. The paging area information stored in the EEPROM is then read. Whether a location registration should be newly done is determined based on the read paging area information.

 
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