Content update feature for an instant messaging service

An information update method in an instant messaging communication network, the method comprising:

• displaying on a viewing window of a second terminal, a first message communicated between a first terminal and the second terminal over an instant messaging service;
• updating a first content in the first message to a second content, in response to receiving an update data packet from the first terminal, wherein the update packet comprises:
• the second content;
• and
• information about location of the first content within the first message.

An update communication packet for updating content of messages communicated between first and second communication terminals over an instant messaging service, the update communication packet comprising:

• a data portion comprising second content to replace first content in a first message communicated between the first terminal and the second terminal;
• and
• a correction information data portion for providing location information of the first content in the first message;
• wherein the first content is replaced with the second content in accordance with the location information, in response to a user interaction with a viewing window of the first terminal.

A first mobile terminal comprising:

• a screen configured to display a first window for displaying messages communicated between the first terminal and a second terminal;
• a user interface, wherein a user may interact with the user interface to update content in a first message displayed in the first window, wherein the first message is previously communicated to and displayed on the second terminal;
• a processor for detecting updated information and constructing an update packet comprising information about the updated information;
• and
• a transmitter for transmitting the update packet to the second terminal to cause a corresponding content update in the first message previously displayed on the second terminal.