Lg Electronics Inc.

Ntt Docomo, Inc.

Jonghyun Jin

Jinju Kim

Sangwoo Kim

Seungjin Ahn

Kazuoki Ichikawa

Joondong Lee

Kazumasa Nitta

Kwanwoo Park

Heechul Yoo

Wooyol Kim

Atsuto Miyata

Ejae Kim

A method for performing roaming in a dual mode terminal, which includes a first wireless communication module corresponding to a first communication network and a second wireless communication module corresponding to a second communication network, is disclosed. The method comprises acquiring a public land mobile network (PLMN) identifier by camping on the first communication network; determining whether connection to the first communication network is roaming by comparing roaming decision information included in the PLMN identifier with roaming decision information stored in the dual mode terminal; turning off the second wireless communication module if it is determined that connection to the first communication network is roaming; and transmitting and receiving a signal to and from the first communication network.

Method for restricting communicating service in roaming in multi mode terminal and apparatus therefor

Growing community of inventors

Seoul, South Korea

Jonghyun Jin