Abstract: Provided is a system for operating review-and-make-money platform (RAMM) including a review posting unit configured to receive a reviewer review, provide the received reviewer review to a consumer terminal, and display the reviewer review on a review article posting screen of the consumer terminal, a review evaluation unit configured to collect and index a consumer evaluation for the displayed review and manage a review satisfaction and a reviewer reliability index, and a priority adjustment unit configured to determine exposure ranking for each review article based on at least one of the review satisfaction and the reviewer reliability index managed by the review evaluation unit.

Abstract: A battery charger for a cellular phone, having a speaker includes an ear jack connected to an ear jack of the cellular phone, for transmitting a voice signal of the cellular phone to the battery charger, a voice amplifier for amplifying the voice signal from the ear jack, and a speaker for converting the voice signal output from the voice amplifier into voice. The battery charger for a cellular phone, having a speaker further includes a communication port connected to a communication port of the cellular phone when the cellular phone is inserted(connected) to the battery charger, for mutually transmitting the voice signal, and a selector for connecting either the communication port or the ear jack with the voice amplifier.

Abstract: The present invention provides a background music play device equipped in a mobile station and methods for playing the background music capable of playing the background music during voice communication between two mobile stations. A background music play device for a mobile station of the present invention includes storage means for storing digital music file; music file play means for playing the digital music file stored in the storage means; output means for outputting voice of caller and music played by the music file play means; input means for inputting voice of receiver; control means which control signal transmittance and receipt, encoding signals to be transmitted and decoding signals received, and outputting the music as a background music according to user's selection.

Abstract: The present invention provides a background music play device equipped in a mobile station and methods for playing the background music capable of playing the background music during voice communication between two mobile stations. A background music play device for a mobile station of the present invention includes storage means for storing digital music file; music file play means for playing the digital music file stored in the storage means; output means for outputting voice of caller and music played by the music file play means; input means for inputting voice of receiver; control means which control signal transmittance and receipt, encoding signals to be transmitted and decoding signals received, and outputting the music as a background music according to user's selection.

Abstract: A battery charger for a cellular phone, having a speaker includes an ear jack connected to an ear jack of the cellular phone, for transmitting a voice signal of the cellular phone to the battery charger, a voice amplifier for amplifying the voice signal from the ear jack, and a speaker for converting the voice signal output from the voice amplifier into voice. The battery charger for a cellular phone, having a speaker further includes a communication port connected to a communication port of the cellular phone when the cellular phone is inserted(connected) to the battery charger, for mutually transmitting the voice signal, and a selector for connecting either the communication port or the ear jack with the voice amplifier.

Abstract: A battery charger for a cellular phone, having a speaker includes an ear jack connected to an ear jack of the cellular phone, for transmitting a voice signal of the cellular phone to the battery charger, a voice amplifier for amplifying the voice signal from the ear jack, and a speaker for converting the voice signal output from the voice amplifier into voice. The battery charger for a cellular phone, having a speaker further includes a communication port connected to a communication port of the cellular phone when the cellular phone is inserted(connected) to the battery charger, for mutually transmitting the voice signal, and a selector for connecting either the communication port or the ear jack with the voice amplifier.