A communication system comprising: a first communication terminal (1, 2a); a first communication device; the first communication terminal (1, 2a) being configured to establish a communication session with the first communication device, the communication session comprising an exchange of video data and audio data between the first communication terminal (1, 2a) and the first communication device; after the communication session is established and has been ongoing, the first communication terminal (1, 2a) being configured to determine that video data is no longer desired to be received from the first communication device during the communication session; the first communication terminal (1, 2a) being configured to determine that video data is no longer desired to be received from the first communication device during the communication session comprises at least one detector of the frst communication terminal (1, 2a) configured to detect the first communication terminal (1, 2a) being moved from a first position to a second position, the first position being a position used for recording a face of a user of the first communication terminal (1, 2a) via a camera sensor of the first communication terminal (1, 2a), the second position being a position in which a speaker of the first communication terminal (1, 2a) is adjacent to an ear of the user; in response to the determining that the video data is no longer desired to be received from the first communication device during the communication session, the first communication terminal (1, 2a) being configured to send a first message to the first communication device; and in response to receiving the first message, the first communication device being configured to stop wthe transmitting of video data during the communication session such that only audio data is transmitted by the first communication device to the first communication terminal (1, 2a) after receipt of the first message and the transmitting of video data during the first communication session is stopped by the first communication device. a first communication terminal (1, 2a); a first communication device; the first communication terminal (1, 2a) being configured to establish a communication session with the first communication device, the communication session comprising an exchange of video data and audio data between the first communication terminal (1, 2a) and the first communication device; after the communication session is established and has been ongoing, the first communication terminal (1, 2a) being configured to determine that video data is no longer desired to be received from the first communication device during the communication session; the first communication terminal (1, 2a) being configured to determine that video data is no longer desired to be received from the first communication device during the communication session comprises at least one detector of the frst communication terminal (1, 2a) configured to detect the first communication terminal (1, 2a) being moved from a first position to a second position, the first position being a position used for recording a face of a user of the first communication terminal (1, 2a) via a camera sensor of the first communication terminal (1, 2a), the second position being a position in which a speaker of the first communication terminal (1, 2a) is adjacent to an ear of the user; in response to the determining that the video data is no longer desired to be received from the first communication device during the communication session, the first communication terminal (1, 2a) being configured to send a first message to the first communication device; and in response to receiving the first message, the first communication device being configured to stop wthe transmitting of video data during the communication session such that only audio data is transmitted by the first communication device to the first communication terminal (1, 2a) after receipt of the first message and the transmitting of video data during the first communication session is stopped by the first communication device.