Patent ID: 7813772
Filing Date: 2010-10-12
Classification: H04B,H04W,Y02D

Abstract:
1. A method of operating a mobile terminal having a plurality of communication operation modes, comprising: determining a current communication operation mode of the plurality of communication operation modes comprising a non-call and a call mode; determining a current voltage of a battery that powers the mobile terminal; comparing the current voltage of the battery with a battery voltage threshold associated with the current communication operation mode; and changing the current communication operation mode to another one of the plurality of communication operation modes based on the comparison of the current voltage of the battery with the battery voltage threshold associated with the current communication operation mode; wherein the mobile terminal has a plurality of call modes comprising: a Global System for Mobile Communications (GSM) 850/900 MHz band mode, a GSM 1800/1900 MHz band mode, a Wideband Code Division Multiple Access (WCDMA) mode, and/or a Voice over Internet Protocol (VoIP) over WiFi mode; wherein the GSM 850/900 MHz band mode has a battery voltage threshold V wherein V