Patent ID: 7107043

Claim:
A method for backing up data set and stored in a portable telephone that cooperates with a host office for telephone communication, said data being selected from the group including a program peculiar to said telephone for waiting for placing or receiving calls, a personal identification number, a ringer sound, a ringer volume, a telephone call sound volume, a telephone call answering function setup, a dial key lock setup, and telephone numbers, comprising the steps of automatically transmitting said data in association with a telephone call operation between said portable telephone and said host office, said data being automatically transmitted by said portable telephone to said host office when a voice signal of a telephone call begins to be delivered and received for the telephone call between said portable telephone and said host office via a radio signal, and storing said data transmitted from said portable telephone in a data backup equipment provided in or connected to said host office where by said data stored in said portable telephone are backed up.