Patent ID: 7454231

Claim:
A portable cellular phone on which a user identity module (UIM) card having user-entered information data and other data is able to be attached and detached, and having a battery pack power that can be turned ON, comprising: a detecting unit, arranged to electrically detect whether or not a UIM card detach/re-attach event occurs, said UIM card detach/re-attach event being a UIM card being detached followed by a UIM card being attached, and to retrievably store a detecting content having a history data indicating the detecting of the UIM detach/re-attach event; and a controlling unit, having a controller memory, the controlling unit arranged to read the detecting content stored in said detecting unit in response to the battery pack power being turned ON and, only when said detecting content includes the history data showing that said UIM card detach/re-attach event has occurred, to read the user-entered information data from the UIM card and store said user-entered information data in said controller memory.