| 摘要 |
The present invention is directed to electronic and global communication systems, devices, and methods resulting from the realization that global usage of mobile phones may be made easier and more secure by providing a system and method which have multiple subscriber identification modules (SIMs) cards including domestic and international SIM cards that enable businessmen, politicians and others to stay connected with their co-workers when traveling abroad by receiving calls and emails without paying high roaming and international fees. |
