Mobile telephone for roaming using dual mode/band equipment including SIM cards
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United States of America Patent
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-
Dec 7, 1999
Grant Date -
N/A
app pub date -
Feb 16, 1996
filing date -
Feb 16, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
According to exemplary embodiments of the present invention, mobile stations are provided with a preferred roaming selection list at a predetermined memory location in a subscriber identity module (SIM). The preferred roaming selection list identifies and prioritizes network operators to which that mobile station can be connected. Pointers are provided in the preferred roaming selection list to memory locations in the SIM where lists of networks associated with each entry in the list are stored. The memory locations are specified to be compatible with existing standards. The preferred roaming selection list can be modified over the air interface, e.g., via SMS class 2 messages, or by the user via the keypad of the mobile station.
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Family
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