| 摘要 |
An Intelligent Pre-paid Service Card (IPSC) (114) for a mobile phone (10) is disclosed, whereby the IPSC (114) performs call charge calculations, instead of the mobile network. The IPSC (114) can be integrated with a conventional SIM card in the mobile phone (10). As such, the mobile network does not have to transmit call charging information to the mobile phone (10). Consequently, any network can handle calls for a roaming pre-paid subscriber whose mobile phone (10) includes an IPSC (114). |
