A method for blocking a voice recording function during a call is performed by a first user terminal in accordance with an embodiment of the present invention for realizing the above-mentioned problems. The methods further comprising the steps of: transmitting, in response to the occurrence of a call signal with the second user terminal, a recording interruption request to the second user terminal; Determining whether the recording blocking program is installed in the second user terminal based on the feedback information received from the second user terminal in response to the transmitted recording blocking request; And a step of, if it is determined that the security program is installed in the second user terminal, stopping the voice recording of the recording interruption program for the call between the first user terminal and the second user terminal in response to the received feedback information The method comprising: determining whether to activate the display device.;
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