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Method to Use an Authorization Based Passive roaming Mode in Cell Phones to Receive Calls

IP.com Disclosure Number: IPCOM000020456D
Original Publication Date: 2003-Nov-21
Included in the Prior Art Database: 2003-Nov-21

Publishing Venue

IBM

Abstract

Currently, cell phone user services can be interrupted for a multiplicity of reasons. Sometimes digital mode services can become unavailable - consider the case where a user is in between cells or is in a geographic area where digital mode coverage is unavailable. In that instance, if the cell phone is set in the AUTO mode, it switches to an roaming mode to receive the call. This is, however, expensive for the user who may not wish to pay the extra charges for roaming mode communication for receiving calls from anybody and everybody. So most cell phones have the capability to operate in roaming mode but typically it is more expensive which is why users mostly tend to program their cell phones in Digital mode to operate in digital mode and switch to roaming when necessary.