Patent ID: 6321097
Filing Date: 2001-11-20
Classification: H04W,Y02D

Abstract:
A method for automatically switching to one of a digital and an analog mode in a dual mode cellular phone, comprising the steps of:(a) checking whether the phone is set to a digital preference mode, upon power-on;(b) checking whether a digital signal is received from a base station and setting the phone to the digital mode upon receipt of the digital signal, when the phone is set to the digital preference mode;(c) setting the phone to the analog mode, when the phone is not set to the digital preference mode in said step (a) or the phone does not receive the digital signal from the base station in said step (b); and(d) returning to said step (b), when a call end key of the phone is not depressed or the phone does not receive a call release message from the base station in step (c).