Abstract: A mobile terminal including a wireless communication unit configured to establish an Instant Messaging (IM) service with at least one other terminal, an input unit configured to receive a designation signal corresponding to a designation of a portion of information included in chat content input during the IM session, a memory configured to store the designated portion of information, a controller configured to receive an input search signal requesting a message inbox including at least one previous IM session conducted on the mobile terminal be searched for the designated portion of information, and to search the message inbox to determine if the at least one previous IM session includes the designated portion of information upon receiving the input search signal, and a display configured to display a part of chat contents of the at least one IM session that includes the designated portion of information when the searching step determines the at least one previous IM session includes the designated portion o

Abstract: A mobile communication terminal for transmitting/receiving image data over a group communication network includes: a push-to-talk (PTT) key for requesting a transmission right in a group communication mode; a vocoder for encoding a user voice signal received via a microphone; a memory for storing various image data; a controller for combining voice data received from the vocoder with the image data read from the memory to form a packet, or separating the image data from the received packet to perform an output control process; and a transceiver for transmitting packet data received from the controller to a group communication management center, or receiving the packet data from the group communication management center.

Abstract: A mobile terminal including a wireless communication unit configured to establish an Instant Messaging (IM) service with at least one other terminal, an input unit configured to receive a designation signal corresponding to a designation of a portion of information included in chat content input during the IM session, a memory configured to store the designated portion of information, a controller configured to receive an input search signal requesting a message inbox including at least one previous IM session conducted on the mobile terminal be searched for the designated portion of information, and to search the message inbox to determine if the at least one previous IM session includes the designated portion of information upon receiving the input search signal, and a display configured to display a part of chat contents of the at least one IM session that includes the designated portion of information when the searching step determines the at least one previous IM session includes the designated portion o