Mobile terminal and controlling method thereof

A mobile terminal, comprising:

• a touchscreen configured to display an image including at least two character pictures;
• a memory configured to store contact information respectively related to the at least two character pictures;
• a wireless communication unit configured to communicate with counterpart terminals corresponding to the contact information;
• and
• a controller configured to:
• when at least two character pictures are touched on the image, search the memory for the contact information respectively related to the at least two character pictures touched on the image;
• form a conversation group with the searched contact information;
• control the wireless communication unit to perform group communication with the conversation group;
• search for messages transceived with counterpart terminals belonging to the conversation group via the group communication with the conversation group;
• unify the searched messages into a single file;
• convert the single file to a file corresponding to a message type supported by each of the counterpart terminals belonging to the conversation group;
• and
• control the wireless communication unit to transmit the converted file to the counterpart terminals belonging to the conversation group.