A portable wireless communication terminal, comprising: a reproducing means for reproducing music or sound; a wireless communication means for transmitting data to a base station; a mail data processing means configured to display and allow editing of mail data of received characters and images, and to allow input of characters and images to be transmitted as mail data; a browsing means for providing an internet browser; and an operation means operable by a user to provide an instruction to stop a telephone function via the wireless communication means, wherein the portable wireless communication terminal is configured such that: when the operation means is operated to provide the instruction to stop the telephone function via the wireless communication means, the portable wireless communication terminal enters into a mode in which: the telephone function via the wireless communication means is stopped; music or sound can still be reproduced by the reproducing means and, in the case that music or sound is being reproduced, the reproduction is continued; characters and images of mail data can still be displayed, edited and/or input via the mail data processing means; and data already received and accumulated in the browsing function means can still be displayed; characterised in that: said wireless communication means comprises a modulating means for modulating transmission data, a frequency-converting means for frequency-converting the thus modulated data to provide a transmission signal, and an amplifying means for amplifying the transmission signal; and said portable wireless communication terminal is configured such that said stopping of said telephone function is carried out by stopping the supply of a voltage to said amplifying means while maintaining the supply of the voltage to said modulating means and said frequency-converting means. a reproducing means for reproducing music or sound; a wireless communication means for transmitting data to a base station; a mail data processing means configured to display and allow editing of mail data of received characters and images, and to allow input of characters and images to be transmitted as mail data; a browsing means for providing an internet browser; and an operation means operable by a user to provide an instruction to stop a telephone function via the wireless communication means, wherein the portable wireless communication terminal is configured such that: when the operation means is operated to provide the instruction to stop the telephone function via the wireless communication means, the portable wireless communication terminal enters into a mode in which: the telephone function via the wireless communication means is stopped; music or sound can still be reproduced by the reproducing means and, in the case that music or sound is being reproduced, the reproduction is continued; characters and images of mail data can still be displayed, edited and/or input via the mail data processing means; and data already received and accumulated in the browsing function means can still be displayed; characterised in that: said wireless communication means comprises a modulating means for modulating transmission data, a frequency-converting means for frequency-converting the thus modulated data to provide a transmission signal, and an amplifying means for amplifying the transmission signal; and said portable wireless communication terminal is configured such that said stopping of said telephone function is carried out by stopping the supply of a voltage to said amplifying means while maintaining the supply of the voltage to said modulating means and said frequency-converting means. the telephone function via the wireless communication means is stopped; music or sound can still be reproduced by the reproducing means and, in the case that music or sound is being reproduced, the reproduction is continued; characters and images of mail data can still be displayed, edited and/or input via the mail data processing means; and data already received and accumulated in the browsing function means can still be displayed; characterised in that: said wireless communication means comprises a modulating means for modulating transmission data, a frequency-converting means for frequency-converting the thus modulated data to provide a transmission signal, and an amplifying means for amplifying the transmission signal; and said portable wireless communication terminal is configured such that said stopping of said telephone function is carried out by stopping the supply of a voltage to said amplifying means while maintaining the supply of the voltage to said modulating means and said frequency-converting means. said wireless communication means comprises a modulating means for modulating transmission data, a frequency-converting means for frequency-converting the thus modulated data to provide a transmission signal, and an amplifying means for amplifying the transmission signal; and said portable wireless communication terminal is configured such that said stopping of said telephone function is carried out by stopping the supply of a voltage to said amplifying means while maintaining the supply of the voltage to said modulating means and said frequency-converting means.